221780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{853}}^1$

素因数の和:875

約数の個数: 24

約数和(自身を含む): 502152

約数和(自身を除く): 280372

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 853, 1706, 3412, 4265, 8530, 11089, 17060, 22178, 44356, 55445, 110890, 221780]

約数ペア:

[(1, 221780), (2, 110890), (4, 55445), (5, 44356), (10, 22178), (13, 17060), (20, 11089), (26, 8530), (52, 4265), (65, 3412), (130, 1706), (260, 853)]