21036080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{179}}^1$

素因数の和:318

約数の個数: 80

約数和(自身を含む): 53434080

約数和(自身を除く): 32398000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 113, 130, 179, 208, 226, 260, 358, 452, 520, 565, 716, 895, 904, 1040, 1130, 1432, 1469, 1790, 1808, 2260, 2327, 2864, 2938, 3580, 4520, 4654, 5876, 7160, 7345, 9040, 9308, 11635, 11752, 14320, 14690, 18616, 20227, 23270, 23504, 29380, 37232, 40454, 46540, 58760, 80908, 93080, 101135, 117520, 161816, 186160, 202270, 262951, 323632, 404540, 525902, 809080, 1051804, 1314755, 1618160, 2103608, 2629510, 4207216, 5259020, 10518040, 21036080]

約数ペア:

[(1, 21036080), (2, 10518040), (4, 5259020), (5, 4207216), (8, 2629510), (10, 2103608), (13, 1618160), (16, 1314755), (20, 1051804), (26, 809080), (40, 525902), (52, 404540), (65, 323632), (80, 262951), (104, 202270), (113, 186160), (130, 161816), (179, 117520), (208, 101135), (226, 93080), (260, 80908), (358, 58760), (452, 46540), (520, 40454), (565, 37232), (716, 29380), (895, 23504), (904, 23270), (1040, 20227), (1130, 18616), (1432, 14690), (1469, 14320), (1790, 11752), (1808, 11635), (2260, 9308), (2327, 9040), (2864, 7345), (2938, 7160), (3580, 5876), (4520, 4654)]