656890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:214

約数の個数: 32

約数和(自身を含む): 1322496

約数和(自身を除く): 665606

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 163, 310, 326, 403, 806, 815, 1630, 2015, 2119, 4030, 4238, 5053, 10106, 10595, 21190, 25265, 50530, 65689, 131378, 328445, 656890]

約数ペア:

[(1, 656890), (2, 328445), (5, 131378), (10, 65689), (13, 50530), (26, 25265), (31, 21190), (62, 10595), (65, 10106), (130, 5053), (155, 4238), (163, 4030), (310, 2119), (326, 2015), (403, 1630), (806, 815)]