64860020

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1\times {\mathrm{499}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 139944000

約数和(自身を除く): 75083980

約数列:

[1, 2, 4, 5, 10, 20, 67, 97, 134, 194, 268, 335, 388, 485, 499, 670, 970, 998, 1340, 1940, 1996, 2495, 4990, 6499, 9980, 12998, 25996, 32495, 33433, 48403, 64990, 66866, 96806, 129980, 133732, 167165, 193612, 242015, 334330, 484030, 668660, 968060, 3243001, 6486002, 12972004, 16215005, 32430010, 64860020]

約数ペア:

[(1, 64860020), (2, 32430010), (4, 16215005), (5, 12972004), (10, 6486002), (20, 3243001), (67, 968060), (97, 668660), (134, 484030), (194, 334330), (268, 242015), (335, 193612), (388, 167165), (485, 133732), (499, 129980), (670, 96806), (970, 66866), (998, 64990), (1340, 48403), (1940, 33433), (1996, 32495), (2495, 25996), (4990, 12998), (6499, 9980)]