640460

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1033}}^1$

素因数の和:1073

約数の個数: 24

約数和(自身を含む): 1389696

約数和(自身を除く): 749236

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 1033, 2066, 4132, 5165, 10330, 20660, 32023, 64046, 128092, 160115, 320230, 640460]

約数ペア:

[(1, 640460), (2, 320230), (4, 160115), (5, 128092), (10, 64046), (20, 32023), (31, 20660), (62, 10330), (124, 5165), (155, 4132), (310, 2066), (620, 1033)]