21540420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:103

約数の個数: 216

約数和(自身を含む): 76684608

約数和(自身を除く): 55144188

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 23, 30, 33, 36, 43, 44, 45, 46, 55, 60, 66, 69, 86, 90, 92, 99, 110, 115, 121, 129, 132, 138, 165, 172, 180, 198, 207, 215, 220, 230, 242, 253, 258, 276, 330, 345, 363, 387, 396, 414, 430, 460, 473, 484, 495, 506, 516, 605, 645, 660, 690, 726, 759, 774, 828, 860, 946, 989, 990, 1012, 1035, 1089, 1210, 1265, 1290, 1380, 1419, 1452, 1518, 1548, 1815, 1892, 1935, 1978, 1980, 2070, 2178, 2277, 2365, 2420, 2530, 2580, 2783, 2838, 2967, 3036, 3630, 3795, 3870, 3956, 4140, 4257, 4356, 4554, 4730, 4945, 5060, 5203, 5445, 5566, 5676, 5934, 7095, 7260, 7590, 7740, 8349, 8514, 8901, 9108, 9460, 9890, 10406, 10879, 10890, 11132, 11385, 11868, 13915, 14190, 14835, 15180, 15609, 16698, 17028, 17802, 19780, 20812, 21285, 21758, 21780, 22770, 25047, 26015, 27830, 28380, 29670, 31218, 32637, 33396, 35604, 41745, 42570, 43516, 44505, 45540, 46827, 50094, 52030, 54395, 55660, 59340, 62436, 65274, 78045, 83490, 85140, 89010, 93654, 97911, 100188, 104060, 108790, 119669, 125235, 130548, 156090, 163185, 166980, 178020, 187308, 195822, 217580, 234135, 239338, 250470, 312180, 326370, 359007, 391644, 468270, 478676, 489555, 500940, 598345, 652740, 718014, 936540, 979110, 1077021, 1196690, 1436028, 1795035, 1958220, 2154042, 2393380, 3590070, 4308084, 5385105, 7180140, 10770210, 21540420]

約数ペア:

[(1, 21540420), (2, 10770210), (3, 7180140), (4, 5385105), (5, 4308084), (6, 3590070), (9, 2393380), (10, 2154042), (11, 1958220), (12, 1795035), (15, 1436028), (18, 1196690), (20, 1077021), (22, 979110), (23, 936540), (30, 718014), (33, 652740), (36, 598345), (43, 500940), (44, 489555), (45, 478676), (46, 468270), (55, 391644), (60, 359007), (66, 326370), (69, 312180), (86, 250470), (90, 239338), (92, 234135), (99, 217580), (110, 195822), (115, 187308), (121, 178020), (129, 166980), (132, 163185), (138, 156090), (165, 130548), (172, 125235), (180, 119669), (198, 108790), (207, 104060), (215, 100188), (220, 97911), (230, 93654), (242, 89010), (253, 85140), (258, 83490), (276, 78045), (330, 65274), (345, 62436), (363, 59340), (387, 55660), (396, 54395), (414, 52030), (430, 50094), (460, 46827), (473, 45540), (484, 44505), (495, 43516), (506, 42570), (516, 41745), (605, 35604), (645, 33396), (660, 32637), (690, 31218), (726, 29670), (759, 28380), (774, 27830), (828, 26015), (860, 25047), (946, 22770), (989, 21780), (990, 21758), (1012, 21285), (1035, 20812), (1089, 19780), (1210, 17802), (1265, 17028), (1290, 16698), (1380, 15609), (1419, 15180), (1452, 14835), (1518, 14190), (1548, 13915), (1815, 11868), (1892, 11385), (1935, 11132), (1978, 10890), (1980, 10879), (2070, 10406), (2178, 9890), (2277, 9460), (2365, 9108), (2420, 8901), (2530, 8514), (2580, 8349), (2783, 7740), (2838, 7590), (2967, 7260), (3036, 7095), (3630, 5934), (3795, 5676), (3870, 5566), (3956, 5445), (4140, 5203), (4257, 5060), (4356, 4945), (4554, 4730)]