20517172

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{571}}^1\times {\mathrm{691}}^1$

素因数の和:1279

約数の個数: 24

約数和(自身を含む): 38790752

約数和(自身を除く): 18273580

約数列:

[1, 2, 4, 13, 26, 52, 571, 691, 1142, 1382, 2284, 2764, 7423, 8983, 14846, 17966, 29692, 35932, 394561, 789122, 1578244, 5129293, 10258586, 20517172]

約数ペア:

[(1, 20517172), (2, 10258586), (4, 5129293), (13, 1578244), (26, 789122), (52, 394561), (571, 35932), (691, 29692), (1142, 17966), (1382, 14846), (2284, 8983), (2764, 7423)]