67688380

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{8039}}^1$

素因数の和:8469

約数の個数: 24

約数和(自身を含む): 142500960

約数和(自身を除く): 74812580

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 4210, 8039, 8420, 16078, 32156, 40195, 80390, 160780, 3384419, 6768838, 13537676, 16922095, 33844190, 67688380]

約数ペア:

[(1, 67688380), (2, 33844190), (4, 16922095), (5, 13537676), (10, 6768838), (20, 3384419), (421, 160780), (842, 80390), (1684, 40195), (2105, 32156), (4210, 16078), (8039, 8420)]