21000638864

素因数分解:

$2^4\times {\mathrm{41}}^2\times {\mathrm{780809}}^1$

素因数の和:780899

約数の個数: 30

約数和(自身を含む): 41705404530

約数和(自身を除く): 20704765666

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 1681, 3362, 6724, 13448, 26896, 780809, 1561618, 3123236, 6246472, 12492944, 32013169, 64026338, 128052676, 256105352, 512210704, 1312539929, 2625079858, 5250159716, 10500319432, 21000638864]

約数ペア:

[(1, 21000638864), (2, 10500319432), (4, 5250159716), (8, 2625079858), (16, 1312539929), (41, 512210704), (82, 256105352), (164, 128052676), (328, 64026338), (656, 32013169), (1681, 12492944), (3362, 6246472), (6724, 3123236), (13448, 1561618), (26896, 780809)]