31721781

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{887}}^1$

素因数の和:1041

約数の個数: 32

約数和(自身を含む): 52512768

約数和(自身を除く): 20790987

約数列:

[1, 3, 7, 13, 21, 39, 91, 131, 273, 393, 887, 917, 1703, 2661, 2751, 5109, 6209, 11531, 11921, 18627, 34593, 35763, 80717, 116197, 242151, 348591, 813379, 1510561, 2440137, 4531683, 10573927, 31721781]

約数ペア:

[(1, 31721781), (3, 10573927), (7, 4531683), (13, 2440137), (21, 1510561), (39, 813379), (91, 348591), (131, 242151), (273, 116197), (393, 80717), (887, 35763), (917, 34593), (1703, 18627), (2661, 11921), (2751, 11531), (5109, 6209)]