21551380

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{227}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 46884096

約数和(自身を除く): 25332716

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 101, 188, 202, 227, 235, 404, 454, 470, 505, 908, 940, 1010, 1135, 2020, 2270, 4540, 4747, 9494, 10669, 18988, 21338, 22927, 23735, 42676, 45854, 47470, 53345, 91708, 94940, 106690, 114635, 213380, 229270, 458540, 1077569, 2155138, 4310276, 5387845, 10775690, 21551380]

約数ペア:

[(1, 21551380), (2, 10775690), (4, 5387845), (5, 4310276), (10, 2155138), (20, 1077569), (47, 458540), (94, 229270), (101, 213380), (188, 114635), (202, 106690), (227, 94940), (235, 91708), (404, 53345), (454, 47470), (470, 45854), (505, 42676), (908, 23735), (940, 22927), (1010, 21338), (1135, 18988), (2020, 10669), (2270, 9494), (4540, 4747)]