21286280

素因数分解:

$2^3\times 5^1\times {\mathrm{433}}^1\times {\mathrm{1229}}^1$

素因数の和:1673

約数の個数: 32

約数和(自身を含む): 48043800

約数和(自身を除く): 26757520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 433, 866, 1229, 1732, 2165, 2458, 3464, 4330, 4916, 6145, 8660, 9832, 12290, 17320, 24580, 49160, 532157, 1064314, 2128628, 2660785, 4257256, 5321570, 10643140, 21286280]

約数ペア:

[(1, 21286280), (2, 10643140), (4, 5321570), (5, 4257256), (8, 2660785), (10, 2128628), (20, 1064314), (40, 532157), (433, 49160), (866, 24580), (1229, 17320), (1732, 12290), (2165, 9832), (2458, 8660), (3464, 6145), (4330, 4916)]