19886978

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{163}}^1\times {\mathrm{1151}}^1$

素因数の和:1369

約数の個数: 16

約数和(自身を含む): 30606336

約数和(自身を除く): 10719358

約数列:

[1, 2, 53, 106, 163, 326, 1151, 2302, 8639, 17278, 61003, 122006, 187613, 375226, 9943489, 19886978]

約数ペア:

[(1, 19886978), (2, 9943489), (53, 375226), (106, 187613), (163, 122006), (326, 61003), (1151, 17278), (2302, 8639)]