645296

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{1301}}^1$

素因数の和:1340

約数の個数: 20

約数和(自身を含む): 1291584

約数和(自身を除く): 646288

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 1301, 2602, 5204, 10408, 20816, 40331, 80662, 161324, 322648, 645296]

約数ペア:

[(1, 645296), (2, 322648), (4, 161324), (8, 80662), (16, 40331), (31, 20816), (62, 10408), (124, 5204), (248, 2602), (496, 1301)]