20402360

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{521}}^1$

素因数の和:632

約数の個数: 64

約数和(自身を含む): 50738400

約数和(自身を除く): 30336040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 89, 110, 178, 220, 356, 440, 445, 521, 712, 890, 979, 1042, 1780, 1958, 2084, 2605, 3560, 3916, 4168, 4895, 5210, 5731, 7832, 9790, 10420, 11462, 19580, 20840, 22924, 28655, 39160, 45848, 46369, 57310, 92738, 114620, 185476, 229240, 231845, 370952, 463690, 510059, 927380, 1020118, 1854760, 2040236, 2550295, 4080472, 5100590, 10201180, 20402360]

約数ペア:

[(1, 20402360), (2, 10201180), (4, 5100590), (5, 4080472), (8, 2550295), (10, 2040236), (11, 1854760), (20, 1020118), (22, 927380), (40, 510059), (44, 463690), (55, 370952), (88, 231845), (89, 229240), (110, 185476), (178, 114620), (220, 92738), (356, 57310), (440, 46369), (445, 45848), (521, 39160), (712, 28655), (890, 22924), (979, 20840), (1042, 19580), (1780, 11462), (1958, 10420), (2084, 9790), (2605, 7832), (3560, 5731), (3916, 5210), (4168, 4895)]