31315921

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{653}}^1$

素因数の和:721

約数の個数: 32

約数和(自身を含む): 42190848

約数和(自身を除く): 10874927

約数列:

[1, 7, 13, 17, 31, 91, 119, 217, 221, 403, 527, 653, 1547, 2821, 3689, 4571, 6851, 8489, 11101, 20243, 47957, 59423, 77707, 141701, 144313, 263159, 344131, 1010191, 1842113, 2408917, 4473703, 31315921]

約数ペア:

[(1, 31315921), (7, 4473703), (13, 2408917), (17, 1842113), (31, 1010191), (91, 344131), (119, 263159), (217, 144313), (221, 141701), (403, 77707), (527, 59423), (653, 47957), (1547, 20243), (2821, 11101), (3689, 8489), (4571, 6851)]