21967539

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{137}}^1$

素因数の和:307

約数の個数: 32

約数和(自身を含む): 33225984

約数和(自身を除く): 11258445

約数列:

[1, 3, 11, 33, 43, 113, 129, 137, 339, 411, 473, 1243, 1419, 1507, 3729, 4521, 4859, 5891, 14577, 15481, 17673, 46443, 53449, 64801, 160347, 170291, 194403, 510873, 665683, 1997049, 7322513, 21967539]

約数ペア:

[(1, 21967539), (3, 7322513), (11, 1997049), (33, 665683), (43, 510873), (113, 194403), (129, 170291), (137, 160347), (339, 64801), (411, 53449), (473, 46443), (1243, 17673), (1419, 15481), (1507, 14577), (3729, 5891), (4521, 4859)]