490340020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{790871}}^1$

素因数の和:790911

約数の個数: 24

約数和(自身を含む): 1062931968

約数和(自身を除く): 572591948

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 790871, 1581742, 3163484, 3954355, 7908710, 15817420, 24517001, 49034002, 98068004, 122585005, 245170010, 490340020]

約数ペア:

[(1, 490340020), (2, 245170010), (4, 122585005), (5, 98068004), (10, 49034002), (20, 24517001), (31, 15817420), (62, 7908710), (124, 3954355), (155, 3163484), (310, 1581742), (620, 790871)]