645087140

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{408283}}^1$

素因数の和:408371

約数の個数: 24

約数和(自身を含む): 1371834240

約数和(自身を除く): 726747100

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 408283, 816566, 1633132, 2041415, 4082830, 8165660, 32254357, 64508714, 129017428, 161271785, 322543570, 645087140]

約数ペア:

[(1, 645087140), (2, 322543570), (4, 161271785), (5, 129017428), (10, 64508714), (20, 32254357), (79, 8165660), (158, 4082830), (316, 2041415), (395, 1633132), (790, 816566), (1580, 408283)]