31231915

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{13}}^1\times {\mathrm{19}}^2$

素因数の和:89

約数の個数: 48

約数和(自身を含む): 46853856

約数和(自身を除く): 15621941

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 121, 143, 209, 247, 361, 605, 715, 1045, 1235, 1331, 1573, 1805, 2299, 2717, 3971, 4693, 6655, 7865, 11495, 13585, 17303, 19855, 23465, 25289, 29887, 43681, 51623, 86515, 126445, 149435, 218405, 258115, 328757, 480491, 567853, 1643785, 2402455, 2839265, 6246383, 31231915]

約数ペア:

[(1, 31231915), (5, 6246383), (11, 2839265), (13, 2402455), (19, 1643785), (55, 567853), (65, 480491), (95, 328757), (121, 258115), (143, 218405), (209, 149435), (247, 126445), (361, 86515), (605, 51623), (715, 43681), (1045, 29887), (1235, 25289), (1331, 23465), (1573, 19855), (1805, 17303), (2299, 13585), (2717, 11495), (3971, 7865), (4693, 6655)]