18680240

素因数分解:

$2^4\times 5^1\times {\mathrm{239}}^1\times {\mathrm{977}}^1$

素因数の和:1229

約数の個数: 40

約数和(自身を含む): 43657920

約数和(自身を除く): 24977680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 239, 478, 956, 977, 1195, 1912, 1954, 2390, 3824, 3908, 4780, 4885, 7816, 9560, 9770, 15632, 19120, 19540, 39080, 78160, 233503, 467006, 934012, 1167515, 1868024, 2335030, 3736048, 4670060, 9340120, 18680240]

約数ペア:

[(1, 18680240), (2, 9340120), (4, 4670060), (5, 3736048), (8, 2335030), (10, 1868024), (16, 1167515), (20, 934012), (40, 467006), (80, 233503), (239, 78160), (478, 39080), (956, 19540), (977, 19120), (1195, 15632), (1912, 9770), (1954, 9560), (2390, 7816), (3824, 4885), (3908, 4780)]