18194920

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2309}}^1$

素因数の和:2517

約数の個数: 32

約数和(自身を含む): 41164200

約数和(自身を除く): 22969280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2309, 3940, 4618, 7880, 9236, 11545, 18472, 23090, 46180, 92360, 454873, 909746, 1819492, 2274365, 3638984, 4548730, 9097460, 18194920]

約数ペア:

[(1, 18194920), (2, 9097460), (4, 4548730), (5, 3638984), (8, 2274365), (10, 1819492), (20, 909746), (40, 454873), (197, 92360), (394, 46180), (788, 23090), (985, 18472), (1576, 11545), (1970, 9236), (2309, 7880), (3940, 4618)]