19901818

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{191}}^1\times {\mathrm{983}}^1$

素因数の和:1229

約数の個数: 16

約数和(自身を含む): 30606336

約数和(自身を除く): 10704518

約数列:

[1, 2, 53, 106, 191, 382, 983, 1966, 10123, 20246, 52099, 104198, 187753, 375506, 9950909, 19901818]

約数ペア:

[(1, 19901818), (2, 9950909), (53, 375506), (106, 187753), (191, 104198), (382, 52099), (983, 20246), (1966, 10123)]