21811240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2609}}^1$

素因数の和:2650

約数の個数: 64

約数和(自身を含む): 56376000

約数和(自身を除く): 34564760

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 44, 55, 76, 88, 95, 110, 152, 190, 209, 220, 380, 418, 440, 760, 836, 1045, 1672, 2090, 2609, 4180, 5218, 8360, 10436, 13045, 20872, 26090, 28699, 49571, 52180, 57398, 99142, 104360, 114796, 143495, 198284, 229592, 247855, 286990, 396568, 495710, 545281, 573980, 991420, 1090562, 1147960, 1982840, 2181124, 2726405, 4362248, 5452810, 10905620, 21811240]

約数ペア:

[(1, 21811240), (2, 10905620), (4, 5452810), (5, 4362248), (8, 2726405), (10, 2181124), (11, 1982840), (19, 1147960), (20, 1090562), (22, 991420), (38, 573980), (40, 545281), (44, 495710), (55, 396568), (76, 286990), (88, 247855), (95, 229592), (110, 198284), (152, 143495), (190, 114796), (209, 104360), (220, 99142), (380, 57398), (418, 52180), (440, 49571), (760, 28699), (836, 26090), (1045, 20872), (1672, 13045), (2090, 10436), (2609, 8360), (4180, 5218)]