639109840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{420467}}^1$

素因数の和:420499

約数の個数: 40

約数和(自身を含む): 1564140960

約数和(自身を除く): 925031120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 420467, 840934, 1681868, 2102335, 3363736, 4204670, 6727472, 7988873, 8409340, 15977746, 16818680, 31955492, 33637360, 39944365, 63910984, 79888730, 127821968, 159777460, 319554920, 639109840]

約数ペア:

[(1, 639109840), (2, 319554920), (4, 159777460), (5, 127821968), (8, 79888730), (10, 63910984), (16, 39944365), (19, 33637360), (20, 31955492), (38, 16818680), (40, 15977746), (76, 8409340), (80, 7988873), (95, 6727472), (152, 4204670), (190, 3363736), (304, 2102335), (380, 1681868), (760, 840934), (1520, 420467)]