21363940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{647}}^1$

素因数の和:796

約数の個数: 48

約数和(自身を含む): 48771072

約数和(自身を除く): 27407132

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 127, 130, 254, 260, 508, 635, 647, 1270, 1294, 1651, 2540, 2588, 3235, 3302, 6470, 6604, 8255, 8411, 12940, 16510, 16822, 33020, 33644, 42055, 82169, 84110, 164338, 168220, 328676, 410845, 821690, 1068197, 1643380, 2136394, 4272788, 5340985, 10681970, 21363940]

約数ペア:

[(1, 21363940), (2, 10681970), (4, 5340985), (5, 4272788), (10, 2136394), (13, 1643380), (20, 1068197), (26, 821690), (52, 410845), (65, 328676), (127, 168220), (130, 164338), (254, 84110), (260, 82169), (508, 42055), (635, 33644), (647, 33020), (1270, 16822), (1294, 16510), (1651, 12940), (2540, 8411), (2588, 8255), (3235, 6604), (3302, 6470)]