20642960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{863}}^1$

素因数の和:912

約数の個数: 80

約数和(自身を含む): 53996544

約数和(自身を除く): 33353584

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 65, 80, 92, 104, 115, 130, 184, 208, 230, 260, 299, 368, 460, 520, 598, 863, 920, 1040, 1196, 1495, 1726, 1840, 2392, 2990, 3452, 4315, 4784, 5980, 6904, 8630, 11219, 11960, 13808, 17260, 19849, 22438, 23920, 34520, 39698, 44876, 56095, 69040, 79396, 89752, 99245, 112190, 158792, 179504, 198490, 224380, 258037, 317584, 396980, 448760, 516074, 793960, 897520, 1032148, 1290185, 1587920, 2064296, 2580370, 4128592, 5160740, 10321480, 20642960]

約数ペア:

[(1, 20642960), (2, 10321480), (4, 5160740), (5, 4128592), (8, 2580370), (10, 2064296), (13, 1587920), (16, 1290185), (20, 1032148), (23, 897520), (26, 793960), (40, 516074), (46, 448760), (52, 396980), (65, 317584), (80, 258037), (92, 224380), (104, 198490), (115, 179504), (130, 158792), (184, 112190), (208, 99245), (230, 89752), (260, 79396), (299, 69040), (368, 56095), (460, 44876), (520, 39698), (598, 34520), (863, 23920), (920, 22438), (1040, 19849), (1196, 17260), (1495, 13808), (1726, 11960), (1840, 11219), (2392, 8630), (2990, 6904), (3452, 5980), (4315, 4784)]