861640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1657}}^1$

素因数の和:1681

約数の個数: 32

約数和(自身を含む): 2089080

約数和(自身を除く): 1227440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1657, 3314, 6628, 8285, 13256, 16570, 21541, 33140, 43082, 66280, 86164, 107705, 172328, 215410, 430820, 861640]

約数ペア:

[(1, 861640), (2, 430820), (4, 215410), (5, 172328), (8, 107705), (10, 86164), (13, 66280), (20, 43082), (26, 33140), (40, 21541), (52, 16570), (65, 13256), (104, 8285), (130, 6628), (260, 3314), (520, 1657)]