20643987

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{75619}}^1$

素因数の和:75642

約数の個数: 16

約数和(自身を含む): 33877760

約数和(自身を除く): 13233773

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 75619, 226857, 529333, 983047, 1587999, 2949141, 6881329, 20643987]

約数ペア:

[(1, 20643987), (3, 6881329), (7, 2949141), (13, 1587999), (21, 983047), (39, 529333), (91, 226857), (273, 75619)]