21845560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:532

約数の個数: 64

約数和(自身を含む): 54172800

約数和(自身を除く): 32327240

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 131, 220, 262, 379, 440, 524, 655, 758, 1048, 1310, 1441, 1516, 1895, 2620, 2882, 3032, 3790, 4169, 5240, 5764, 7205, 7580, 8338, 11528, 14410, 15160, 16676, 20845, 28820, 33352, 41690, 49649, 57640, 83380, 99298, 166760, 198596, 248245, 397192, 496490, 546139, 992980, 1092278, 1985960, 2184556, 2730695, 4369112, 5461390, 10922780, 21845560]

約数ペア:

[(1, 21845560), (2, 10922780), (4, 5461390), (5, 4369112), (8, 2730695), (10, 2184556), (11, 1985960), (20, 1092278), (22, 992980), (40, 546139), (44, 496490), (55, 397192), (88, 248245), (110, 198596), (131, 166760), (220, 99298), (262, 83380), (379, 57640), (440, 49649), (524, 41690), (655, 33352), (758, 28820), (1048, 20845), (1310, 16676), (1441, 15160), (1516, 14410), (1895, 11528), (2620, 8338), (2882, 7580), (3032, 7205), (3790, 5764), (4169, 5240)]