81571820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{599}}^1\times {\mathrm{619}}^1$

素因数の和:1238

約数の個数: 48

約数和(自身を含む): 187488000

約数和(自身を除く): 105916180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 599, 619, 1198, 1238, 2396, 2476, 2995, 3095, 5990, 6190, 6589, 6809, 11980, 12380, 13178, 13618, 26356, 27236, 32945, 34045, 65890, 68090, 131780, 136180, 370781, 741562, 1483124, 1853905, 3707810, 4078591, 7415620, 8157182, 16314364, 20392955, 40785910, 81571820]

約数ペア:

[(1, 81571820), (2, 40785910), (4, 20392955), (5, 16314364), (10, 8157182), (11, 7415620), (20, 4078591), (22, 3707810), (44, 1853905), (55, 1483124), (110, 741562), (220, 370781), (599, 136180), (619, 131780), (1198, 68090), (1238, 65890), (2396, 34045), (2476, 32945), (2995, 27236), (3095, 26356), (5990, 13618), (6190, 13178), (6589, 12380), (6809, 11980)]