21228676

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 45079552

約数和(自身を除く): 23850876

約数列:

[1, 2, 4, 7, 14, 28, 31, 37, 62, 74, 124, 148, 217, 259, 434, 518, 661, 868, 1036, 1147, 1322, 2294, 2644, 4588, 4627, 8029, 9254, 16058, 18508, 20491, 24457, 32116, 40982, 48914, 81964, 97828, 143437, 171199, 286874, 342398, 573748, 684796, 758167, 1516334, 3032668, 5307169, 10614338, 21228676]

約数ペア:

[(1, 21228676), (2, 10614338), (4, 5307169), (7, 3032668), (14, 1516334), (28, 758167), (31, 684796), (37, 573748), (62, 342398), (74, 286874), (124, 171199), (148, 143437), (217, 97828), (259, 81964), (434, 48914), (518, 40982), (661, 32116), (868, 24457), (1036, 20491), (1147, 18508), (1322, 16058), (2294, 9254), (2644, 8029), (4588, 4627)]