1290220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2081}}^1$

素因数の和:2121

約数の個数: 24

約数和(自身を含む): 2798208

約数和(自身を除く): 1507988

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 2081, 4162, 8324, 10405, 20810, 41620, 64511, 129022, 258044, 322555, 645110, 1290220]

約数ペア:

[(1, 1290220), (2, 645110), (4, 322555), (5, 258044), (10, 129022), (20, 64511), (31, 41620), (62, 20810), (124, 10405), (155, 8324), (310, 4162), (620, 2081)]