20978540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{571}}^1$

素因数の和:758

約数の個数: 48

約数和(自身を含む): 48432384

約数和(自身を除く): 27453844

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 167, 220, 334, 571, 668, 835, 1142, 1670, 1837, 2284, 2855, 3340, 3674, 5710, 6281, 7348, 9185, 11420, 12562, 18370, 25124, 31405, 36740, 62810, 95357, 125620, 190714, 381428, 476785, 953570, 1048927, 1907140, 2097854, 4195708, 5244635, 10489270, 20978540]

約数ペア:

[(1, 20978540), (2, 10489270), (4, 5244635), (5, 4195708), (10, 2097854), (11, 1907140), (20, 1048927), (22, 953570), (44, 476785), (55, 381428), (110, 190714), (167, 125620), (220, 95357), (334, 62810), (571, 36740), (668, 31405), (835, 25124), (1142, 18370), (1670, 12562), (1837, 11420), (2284, 9185), (2855, 7348), (3340, 6281), (3674, 5710)]