81251560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156253}}^1$

素因数の和:156277

約数の個数: 32

約数和(自身を含む): 196880040

約数和(自身を除く): 115628480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 156253, 312506, 625012, 781265, 1250024, 1562530, 2031289, 3125060, 4062578, 6250120, 8125156, 10156445, 16250312, 20312890, 40625780, 81251560]

約数ペア:

[(1, 81251560), (2, 40625780), (4, 20312890), (5, 16250312), (8, 10156445), (10, 8125156), (13, 6250120), (20, 4062578), (26, 3125060), (40, 2031289), (52, 1562530), (65, 1250024), (104, 781265), (130, 625012), (260, 312506), (520, 156253)]