21752840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12647}}^1$

素因数の和:12701

約数の個数: 32

約数和(自身を含む): 50086080

約数和(自身を除く): 28333240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12647, 25294, 50588, 63235, 101176, 126470, 252940, 505880, 543821, 1087642, 2175284, 2719105, 4350568, 5438210, 10876420, 21752840]

約数ペア:

[(1, 21752840), (2, 10876420), (4, 5438210), (5, 4350568), (8, 2719105), (10, 2175284), (20, 1087642), (40, 543821), (43, 505880), (86, 252940), (172, 126470), (215, 101176), (344, 63235), (430, 50588), (860, 25294), (1720, 12647)]