644828

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:233

約数の個数: 24

約数和(自身を含む): 1212288

約数和(自身を除く): 567460

約数列:

[1, 2, 4, 23, 43, 46, 86, 92, 163, 172, 326, 652, 989, 1978, 3749, 3956, 7009, 7498, 14018, 14996, 28036, 161207, 322414, 644828]

約数ペア:

[(1, 644828), (2, 322414), (4, 161207), (23, 28036), (43, 14996), (46, 14018), (86, 7498), (92, 7009), (163, 3956), (172, 3749), (326, 1978), (652, 989)]