31340309

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{239}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 42577920

約数和(自身を除く): 11237611

約数列:

[1, 7, 11, 13, 77, 91, 131, 143, 239, 917, 1001, 1441, 1673, 1703, 2629, 3107, 10087, 11921, 18403, 18733, 21749, 31309, 34177, 131131, 219163, 239239, 344399, 407017, 2410793, 2849119, 4477187, 31340309]

約数ペア:

[(1, 31340309), (7, 4477187), (11, 2849119), (13, 2410793), (77, 407017), (91, 344399), (131, 239239), (143, 219163), (239, 131131), (917, 34177), (1001, 31309), (1441, 21749), (1673, 18733), (1703, 18403), (2629, 11921), (3107, 10087)]