21214520

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2113}}^1$

素因数の和:2375

約数の個数: 32

約数和(自身を含む): 47945520

約数和(自身を除く): 26731000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2113, 2510, 4226, 5020, 8452, 10040, 10565, 16904, 21130, 42260, 84520, 530363, 1060726, 2121452, 2651815, 4242904, 5303630, 10607260, 21214520]

約数ペア:

[(1, 21214520), (2, 10607260), (4, 5303630), (5, 4242904), (8, 2651815), (10, 2121452), (20, 1060726), (40, 530363), (251, 84520), (502, 42260), (1004, 21130), (1255, 16904), (2008, 10565), (2113, 10040), (2510, 8452), (4226, 5020)]