21056940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:212

約数の個数: 144

約数和(自身を含む): 69189120

約数和(自身を除く): 48132180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 47, 57, 60, 76, 90, 94, 95, 114, 131, 141, 171, 180, 188, 190, 228, 235, 262, 282, 285, 342, 380, 393, 423, 470, 524, 564, 570, 655, 684, 705, 786, 846, 855, 893, 940, 1140, 1179, 1310, 1410, 1572, 1692, 1710, 1786, 1965, 2115, 2358, 2489, 2620, 2679, 2820, 3420, 3572, 3930, 4230, 4465, 4716, 4978, 5358, 5895, 6157, 7467, 7860, 8037, 8460, 8930, 9956, 10716, 11790, 12314, 12445, 13395, 14934, 16074, 17860, 18471, 22401, 23580, 24628, 24890, 26790, 29868, 30785, 32148, 36942, 37335, 40185, 44802, 49780, 53580, 55413, 61570, 73884, 74670, 80370, 89604, 92355, 110826, 112005, 116983, 123140, 149340, 160740, 184710, 221652, 224010, 233966, 277065, 350949, 369420, 448020, 467932, 554130, 584915, 701898, 1052847, 1108260, 1169830, 1403796, 1754745, 2105694, 2339660, 3509490, 4211388, 5264235, 7018980, 10528470, 21056940]

約数ペア:

[(1, 21056940), (2, 10528470), (3, 7018980), (4, 5264235), (5, 4211388), (6, 3509490), (9, 2339660), (10, 2105694), (12, 1754745), (15, 1403796), (18, 1169830), (19, 1108260), (20, 1052847), (30, 701898), (36, 584915), (38, 554130), (45, 467932), (47, 448020), (57, 369420), (60, 350949), (76, 277065), (90, 233966), (94, 224010), (95, 221652), (114, 184710), (131, 160740), (141, 149340), (171, 123140), (180, 116983), (188, 112005), (190, 110826), (228, 92355), (235, 89604), (262, 80370), (282, 74670), (285, 73884), (342, 61570), (380, 55413), (393, 53580), (423, 49780), (470, 44802), (524, 40185), (564, 37335), (570, 36942), (655, 32148), (684, 30785), (705, 29868), (786, 26790), (846, 24890), (855, 24628), (893, 23580), (940, 22401), (1140, 18471), (1179, 17860), (1310, 16074), (1410, 14934), (1572, 13395), (1692, 12445), (1710, 12314), (1786, 11790), (1965, 10716), (2115, 9956), (2358, 8930), (2489, 8460), (2620, 8037), (2679, 7860), (2820, 7467), (3420, 6157), (3572, 5895), (3930, 5358), (4230, 4978), (4465, 4716)]