21988840

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{2281}}^1$

素因数の和:2533

約数の個数: 32

約数和(自身を含む): 49701960

約数和(自身を除く): 27713120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 2281, 2410, 4562, 4820, 9124, 9640, 11405, 18248, 22810, 45620, 91240, 549721, 1099442, 2198884, 2748605, 4397768, 5497210, 10994420, 21988840]

約数ペア:

[(1, 21988840), (2, 10994420), (4, 5497210), (5, 4397768), (8, 2748605), (10, 2198884), (20, 1099442), (40, 549721), (241, 91240), (482, 45620), (964, 22810), (1205, 18248), (1928, 11405), (2281, 9640), (2410, 9124), (4562, 4820)]