20905960

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1579}}^1$

素因数の和:1921

約数の個数: 32

約数和(自身を含む): 47210400

約数和(自身を除く): 26304440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1579, 1655, 2648, 3158, 3310, 6316, 6620, 7895, 12632, 13240, 15790, 31580, 63160, 522649, 1045298, 2090596, 2613245, 4181192, 5226490, 10452980, 20905960]

約数ペア:

[(1, 20905960), (2, 10452980), (4, 5226490), (5, 4181192), (8, 2613245), (10, 2090596), (20, 1045298), (40, 522649), (331, 63160), (662, 31580), (1324, 15790), (1579, 13240), (1655, 12632), (2648, 7895), (3158, 6620), (3310, 6316)]