21313820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{5099}}^1$

素因数の和:5138

約数の個数: 48

約数和(自身を含む): 51408000

約数和(自身を除く): 30094180

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 5099, 10198, 20396, 25495, 50990, 56089, 96881, 101980, 112178, 193762, 224356, 280445, 387524, 484405, 560890, 968810, 1065691, 1121780, 1937620, 2131382, 4262764, 5328455, 10656910, 21313820]

約数ペア:

[(1, 21313820), (2, 10656910), (4, 5328455), (5, 4262764), (10, 2131382), (11, 1937620), (19, 1121780), (20, 1065691), (22, 968810), (38, 560890), (44, 484405), (55, 387524), (76, 280445), (95, 224356), (110, 193762), (190, 112178), (209, 101980), (220, 96881), (380, 56089), (418, 50990), (836, 25495), (1045, 20396), (2090, 10198), (4180, 5099)]