399455780

素因数分解:

$2^2\times 5^1\times {\mathrm{2423}}^1\times {\mathrm{8243}}^1$

素因数の和:10675

約数の個数: 24

約数和(自身を含む): 839305152

約数和(自身を除く): 439849372

約数列:

[1, 2, 4, 5, 10, 20, 2423, 4846, 8243, 9692, 12115, 16486, 24230, 32972, 41215, 48460, 82430, 164860, 19972789, 39945578, 79891156, 99863945, 199727890, 399455780]

約数ペア:

[(1, 399455780), (2, 199727890), (4, 99863945), (5, 79891156), (10, 39945578), (20, 19972789), (2423, 164860), (4846, 82430), (8243, 48460), (9692, 41215), (12115, 32972), (16486, 24230)]