20561120

素因数分解:

$2^5\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1201}}^1$

素因数の和:1323

約数の個数: 48

約数和(自身を含む): 49070448

約数和(自身を除く): 28509328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 107, 160, 214, 428, 535, 856, 1070, 1201, 1712, 2140, 2402, 3424, 4280, 4804, 6005, 8560, 9608, 12010, 17120, 19216, 24020, 38432, 48040, 96080, 128507, 192160, 257014, 514028, 642535, 1028056, 1285070, 2056112, 2570140, 4112224, 5140280, 10280560, 20561120]

約数ペア:

[(1, 20561120), (2, 10280560), (4, 5140280), (5, 4112224), (8, 2570140), (10, 2056112), (16, 1285070), (20, 1028056), (32, 642535), (40, 514028), (80, 257014), (107, 192160), (160, 128507), (214, 96080), (428, 48040), (535, 38432), (856, 24020), (1070, 19216), (1201, 17120), (1712, 12010), (2140, 9608), (2402, 8560), (3424, 6005), (4280, 4804)]