20452840

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1613}}^1$

素因数の和:1941

約数の個数: 32

約数和(自身を含む): 46192680

約数和(自身を除く): 25739840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 1613, 2536, 3170, 3226, 6340, 6452, 8065, 12680, 12904, 16130, 32260, 64520, 511321, 1022642, 2045284, 2556605, 4090568, 5113210, 10226420, 20452840]

約数ペア:

[(1, 20452840), (2, 10226420), (4, 5113210), (5, 4090568), (8, 2556605), (10, 2045284), (20, 1022642), (40, 511321), (317, 64520), (634, 32260), (1268, 16130), (1585, 12904), (1613, 12680), (2536, 8065), (3170, 6452), (3226, 6340)]