20995920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{241}}^1$

素因数の和:282

約数の個数: 180

約数和(自身を含む): 77825748

約数和(自身を除く): 56829828

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 99, 110, 120, 121, 132, 144, 165, 176, 180, 198, 220, 240, 241, 242, 264, 330, 360, 363, 396, 440, 482, 484, 495, 528, 605, 660, 720, 723, 726, 792, 880, 964, 968, 990, 1089, 1205, 1210, 1320, 1446, 1452, 1584, 1815, 1928, 1936, 1980, 2169, 2178, 2410, 2420, 2640, 2651, 2892, 2904, 3615, 3630, 3856, 3960, 4338, 4356, 4820, 4840, 5302, 5445, 5784, 5808, 7230, 7260, 7920, 7953, 8676, 8712, 9640, 9680, 10604, 10845, 10890, 11568, 13255, 14460, 14520, 15906, 17352, 17424, 19280, 21208, 21690, 21780, 23859, 26510, 28920, 29040, 29161, 31812, 34704, 39765, 42416, 43380, 43560, 47718, 53020, 57840, 58322, 63624, 79530, 86760, 87120, 87483, 95436, 106040, 116644, 119295, 127248, 145805, 159060, 173520, 174966, 190872, 212080, 233288, 238590, 262449, 291610, 318120, 349932, 381744, 437415, 466576, 477180, 524898, 583220, 636240, 699864, 874830, 954360, 1049796, 1166440, 1312245, 1399728, 1749660, 1908720, 2099592, 2332880, 2624490, 3499320, 4199184, 5248980, 6998640, 10497960, 20995920]

約数ペア:

[(1, 20995920), (2, 10497960), (3, 6998640), (4, 5248980), (5, 4199184), (6, 3499320), (8, 2624490), (9, 2332880), (10, 2099592), (11, 1908720), (12, 1749660), (15, 1399728), (16, 1312245), (18, 1166440), (20, 1049796), (22, 954360), (24, 874830), (30, 699864), (33, 636240), (36, 583220), (40, 524898), (44, 477180), (45, 466576), (48, 437415), (55, 381744), (60, 349932), (66, 318120), (72, 291610), (80, 262449), (88, 238590), (90, 233288), (99, 212080), (110, 190872), (120, 174966), (121, 173520), (132, 159060), (144, 145805), (165, 127248), (176, 119295), (180, 116644), (198, 106040), (220, 95436), (240, 87483), (241, 87120), (242, 86760), (264, 79530), (330, 63624), (360, 58322), (363, 57840), (396, 53020), (440, 47718), (482, 43560), (484, 43380), (495, 42416), (528, 39765), (605, 34704), (660, 31812), (720, 29161), (723, 29040), (726, 28920), (792, 26510), (880, 23859), (964, 21780), (968, 21690), (990, 21208), (1089, 19280), (1205, 17424), (1210, 17352), (1320, 15906), (1446, 14520), (1452, 14460), (1584, 13255), (1815, 11568), (1928, 10890), (1936, 10845), (1980, 10604), (2169, 9680), (2178, 9640), (2410, 8712), (2420, 8676), (2640, 7953), (2651, 7920), (2892, 7260), (2904, 7230), (3615, 5808), (3630, 5784), (3856, 5445), (3960, 5302), (4338, 4840), (4356, 4820)]