21440445

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2557}}^1$

素因数の和:2621

約数の個数: 32

約数和(自身を含む): 37817472

約数和(自身を除く): 16377027

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 195, 215, 559, 645, 1677, 2557, 2795, 7671, 8385, 12785, 33241, 38355, 99723, 109951, 166205, 329853, 498615, 549755, 1429363, 1649265, 4288089, 7146815, 21440445]

約数ペア:

[(1, 21440445), (3, 7146815), (5, 4288089), (13, 1649265), (15, 1429363), (39, 549755), (43, 498615), (65, 329853), (129, 166205), (195, 109951), (215, 99723), (559, 38355), (645, 33241), (1677, 12785), (2557, 8385), (2795, 7671)]