21360440

素因数分解:

$2^3\times 5^1\times {\mathrm{379}}^1\times {\mathrm{1409}}^1$

素因数の和:1799

約数の個数: 32

約数和(自身を含む): 48222000

約数和(自身を除く): 26861560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 379, 758, 1409, 1516, 1895, 2818, 3032, 3790, 5636, 7045, 7580, 11272, 14090, 15160, 28180, 56360, 534011, 1068022, 2136044, 2670055, 4272088, 5340110, 10680220, 21360440]

約数ペア:

[(1, 21360440), (2, 10680220), (4, 5340110), (5, 4272088), (8, 2670055), (10, 2136044), (20, 1068022), (40, 534011), (379, 56360), (758, 28180), (1409, 15160), (1516, 14090), (1895, 11272), (2818, 7580), (3032, 7045), (3790, 5636)]