21000831995

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{167}}^1\times {\mathrm{271}}^1$

素因数の和:537

約数の個数: 96

約数和(自身を含む): 30630942720

約数和(自身を除く): 9630110725

約数列:

[1, 5, 11, 13, 55, 59, 65, 121, 143, 167, 271, 295, 605, 649, 715, 767, 835, 1355, 1573, 1837, 2171, 2981, 3245, 3523, 3835, 7139, 7865, 8437, 9185, 9853, 10855, 14905, 15989, 17615, 20207, 23881, 32791, 35695, 38753, 42185, 45257, 49265, 79945, 92807, 101035, 108383, 119405, 128089, 163955, 175879, 193765, 207857, 226285, 262691, 426283, 464035, 497827, 541915, 588341, 640445, 879395, 1039285, 1192213, 1313455, 1408979, 1934669, 2131415, 2286427, 2489135, 2670163, 2941705, 5476097, 5961065, 6471751, 7044895, 9673345, 11432135, 13350815, 15498769, 25150697, 27380485, 29371793, 32358755, 34712119, 71189261, 77493845, 125753485, 146858965, 173560595, 323089723, 355946305, 381833309, 1615448615, 1909166545, 4200166399, 21000831995]

約数ペア:

[(1, 21000831995), (5, 4200166399), (11, 1909166545), (13, 1615448615), (55, 381833309), (59, 355946305), (65, 323089723), (121, 173560595), (143, 146858965), (167, 125753485), (271, 77493845), (295, 71189261), (605, 34712119), (649, 32358755), (715, 29371793), (767, 27380485), (835, 25150697), (1355, 15498769), (1573, 13350815), (1837, 11432135), (2171, 9673345), (2981, 7044895), (3245, 6471751), (3523, 5961065), (3835, 5476097), (7139, 2941705), (7865, 2670163), (8437, 2489135), (9185, 2286427), (9853, 2131415), (10855, 1934669), (14905, 1408979), (15989, 1313455), (17615, 1192213), (20207, 1039285), (23881, 879395), (32791, 640445), (35695, 588341), (38753, 541915), (42185, 497827), (45257, 464035), (49265, 426283), (79945, 262691), (92807, 226285), (101035, 207857), (108383, 193765), (119405, 175879), (128089, 163955)]