20404120

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{587}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 30399080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 587, 632, 790, 869, 1174, 1580, 1738, 2348, 2935, 3160, 3476, 4345, 4696, 5870, 6457, 6952, 8690, 11740, 12914, 17380, 23480, 25828, 32285, 34760, 46373, 51656, 64570, 92746, 129140, 185492, 231865, 258280, 370984, 463730, 510103, 927460, 1020206, 1854920, 2040412, 2550515, 4080824, 5101030, 10202060, 20404120]

約数ペア:

[(1, 20404120), (2, 10202060), (4, 5101030), (5, 4080824), (8, 2550515), (10, 2040412), (11, 1854920), (20, 1020206), (22, 927460), (40, 510103), (44, 463730), (55, 370984), (79, 258280), (88, 231865), (110, 185492), (158, 129140), (220, 92746), (316, 64570), (395, 51656), (440, 46373), (587, 34760), (632, 32285), (790, 25828), (869, 23480), (1174, 17380), (1580, 12914), (1738, 11740), (2348, 8690), (2935, 6952), (3160, 6457), (3476, 5870), (4345, 4696)]