21911720

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{2273}}^1$

素因数の和:2525

約数の個数: 32

約数和(自身を含む): 49527720

約数和(自身を除く): 27616000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 2273, 2410, 4546, 4820, 9092, 9640, 11365, 18184, 22730, 45460, 90920, 547793, 1095586, 2191172, 2738965, 4382344, 5477930, 10955860, 21911720]

約数ペア:

[(1, 21911720), (2, 10955860), (4, 5477930), (5, 4382344), (8, 2738965), (10, 2191172), (20, 1095586), (40, 547793), (241, 90920), (482, 45460), (964, 22730), (1205, 18184), (1928, 11365), (2273, 9640), (2410, 9092), (4546, 4820)]