20581587

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{307}}^1$

素因数の和:520

約数の個数: 32

約数和(自身を含む): 33116160

約数和(自身を除く): 12534573

約数列:

[1, 3, 9, 13, 27, 39, 117, 191, 307, 351, 573, 921, 1719, 2483, 2763, 3991, 5157, 7449, 8289, 11973, 22347, 35919, 58637, 67041, 107757, 175911, 527733, 762281, 1583199, 2286843, 6860529, 20581587]

約数ペア:

[(1, 20581587), (3, 6860529), (9, 2286843), (13, 1583199), (27, 762281), (39, 527733), (117, 175911), (191, 107757), (307, 67041), (351, 58637), (573, 35919), (921, 22347), (1719, 11973), (2483, 8289), (2763, 7449), (3991, 5157)]