21903020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26711}}^1$

素因数の和:26761

約数の個数: 24

約数和(自身を含む): 47119968

約数和(自身を除く): 25216948

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26711, 53422, 106844, 133555, 267110, 534220, 1095151, 2190302, 4380604, 5475755, 10951510, 21903020]

約数ペア:

[(1, 21903020), (2, 10951510), (4, 5475755), (5, 4380604), (10, 2190302), (20, 1095151), (41, 534220), (82, 267110), (164, 133555), (205, 106844), (410, 53422), (820, 26711)]