21313705

素因数分解:

$5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{149}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 30355200

約数和(自身を除く): 9041495

約数列:

[1, 5, 7, 35, 61, 67, 149, 305, 335, 427, 469, 745, 1043, 2135, 2345, 4087, 5215, 9089, 9983, 20435, 28609, 45445, 49915, 63623, 69881, 143045, 318115, 349405, 608963, 3044815, 4262741, 21313705]

約数ペア:

[(1, 21313705), (5, 4262741), (7, 3044815), (35, 608963), (61, 349405), (67, 318115), (149, 143045), (305, 69881), (335, 63623), (427, 49915), (469, 45445), (745, 28609), (1043, 20435), (2135, 9983), (2345, 9089), (4087, 5215)]