21307020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{523}}^1$

素因数の和:639

約数の個数: 96

約数和(自身を含む): 69017088

約数和(自身を除く): 47710068

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 97, 105, 140, 194, 210, 291, 388, 420, 485, 523, 582, 679, 970, 1046, 1164, 1358, 1455, 1569, 1940, 2037, 2092, 2615, 2716, 2910, 3138, 3395, 3661, 4074, 5230, 5820, 6276, 6790, 7322, 7845, 8148, 10185, 10460, 10983, 13580, 14644, 15690, 18305, 20370, 21966, 31380, 36610, 40740, 43932, 50731, 54915, 73220, 101462, 109830, 152193, 202924, 219660, 253655, 304386, 355117, 507310, 608772, 710234, 760965, 1014620, 1065351, 1420468, 1521930, 1775585, 2130702, 3043860, 3551170, 4261404, 5326755, 7102340, 10653510, 21307020]

約数ペア:

[(1, 21307020), (2, 10653510), (3, 7102340), (4, 5326755), (5, 4261404), (6, 3551170), (7, 3043860), (10, 2130702), (12, 1775585), (14, 1521930), (15, 1420468), (20, 1065351), (21, 1014620), (28, 760965), (30, 710234), (35, 608772), (42, 507310), (60, 355117), (70, 304386), (84, 253655), (97, 219660), (105, 202924), (140, 152193), (194, 109830), (210, 101462), (291, 73220), (388, 54915), (420, 50731), (485, 43932), (523, 40740), (582, 36610), (679, 31380), (970, 21966), (1046, 20370), (1164, 18305), (1358, 15690), (1455, 14644), (1569, 13580), (1940, 10983), (2037, 10460), (2092, 10185), (2615, 8148), (2716, 7845), (2910, 7322), (3138, 6790), (3395, 6276), (3661, 5820), (4074, 5230)]