20906320

素因数分解:

$2^4\times 5^1\times {\mathrm{261329}}^1$

素因数の和:261342

約数の個数: 20

約数和(自身を含む): 48607380

約数和(自身を除く): 27701060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261329, 522658, 1045316, 1306645, 2090632, 2613290, 4181264, 5226580, 10453160, 20906320]

約数ペア:

[(1, 20906320), (2, 10453160), (4, 5226580), (5, 4181264), (8, 2613290), (10, 2090632), (16, 1306645), (20, 1045316), (40, 522658), (80, 261329)]