399961220

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{101513}}^1$

素因数の和:101719

約数の個数: 24

約数和(自身を含む): 844190424

約数和(自身を除く): 444229204

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 101513, 203026, 406052, 507565, 1015130, 2030260, 19998061, 39996122, 79992244, 99990305, 199980610, 399961220]

約数ペア:

[(1, 399961220), (2, 199980610), (4, 99990305), (5, 79992244), (10, 39996122), (20, 19998061), (197, 2030260), (394, 1015130), (788, 507565), (985, 406052), (1970, 203026), (3940, 101513)]