21620020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{34871}}^1$

素因数の和:34911

約数の個数: 24

約数和(自身を含む): 46867968

約数和(自身を除く): 25247948

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 34871, 69742, 139484, 174355, 348710, 697420, 1081001, 2162002, 4324004, 5405005, 10810010, 21620020]

約数ペア:

[(1, 21620020), (2, 10810010), (4, 5405005), (5, 4324004), (10, 2162002), (20, 1081001), (31, 697420), (62, 348710), (124, 174355), (155, 139484), (310, 69742), (620, 34871)]