21019804

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{2677}}^1$

素因数の和:2845

約数の個数: 24

約数和(自身を含む): 39891488

約数和(自身を除く): 18871684

約数列:

[1, 2, 4, 13, 26, 52, 151, 302, 604, 1963, 2677, 3926, 5354, 7852, 10708, 34801, 69602, 139204, 404227, 808454, 1616908, 5254951, 10509902, 21019804]

約数ペア:

[(1, 21019804), (2, 10509902), (4, 5254951), (13, 1616908), (26, 808454), (52, 404227), (151, 139204), (302, 69602), (604, 34801), (1963, 10708), (2677, 7852), (3926, 5354)]