86720020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139871}}^1$

素因数の和:139911

約数の個数: 24

約数和(自身を含む): 187987968

約数和(自身を除く): 101267948

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 139871, 279742, 559484, 699355, 1398710, 2797420, 4336001, 8672002, 17344004, 21680005, 43360010, 86720020]

約数ペア:

[(1, 86720020), (2, 43360010), (4, 21680005), (5, 17344004), (10, 8672002), (20, 4336001), (31, 2797420), (62, 1398710), (124, 699355), (155, 559484), (310, 279742), (620, 139871)]