99997990

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{71941}}^1$

素因数の和:72087

約数の個数: 16

約数和(自身を含む): 181293840

約数和(自身を除く): 81295850

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 71941, 143882, 359705, 719410, 9999799, 19999598, 49998995, 99997990]

約数ペア:

[(1, 99997990), (2, 49998995), (5, 19999598), (10, 9999799), (139, 719410), (278, 359705), (695, 143882), (1390, 71941)]