1685840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1621}}^1$

素因数の和:1647

約数の個数: 40

約数和(自身を含む): 4223688

約数和(自身を除く): 2537848

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 1621, 3242, 6484, 8105, 12968, 16210, 21073, 25936, 32420, 42146, 64840, 84292, 105365, 129680, 168584, 210730, 337168, 421460, 842920, 1685840]

約数ペア:

[(1, 1685840), (2, 842920), (4, 421460), (5, 337168), (8, 210730), (10, 168584), (13, 129680), (16, 105365), (20, 84292), (26, 64840), (40, 42146), (52, 32420), (65, 25936), (80, 21073), (104, 16210), (130, 12968), (208, 8105), (260, 6484), (520, 3242), (1040, 1621)]