20121802565

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{900103}}^1$

素因数の和:900388

約数の個数: 16

約数和(自身を含む): 25663765248

約数和(自身を除く): 5541962683

約数列:

[1, 5, 17, 85, 263, 1315, 4471, 22355, 900103, 4500515, 15301751, 76508755, 236727089, 1183635445, 4024360513, 20121802565]

約数ペア:

[(1, 20121802565), (5, 4024360513), (17, 1183635445), (85, 236727089), (263, 76508755), (1315, 15301751), (4471, 4500515), (22355, 900103)]