19912503

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{281}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 30320640

約数和(自身を除く): 10408137

約数列:

[1, 3, 13, 23, 39, 69, 79, 237, 281, 299, 843, 897, 1027, 1817, 3081, 3653, 5451, 6463, 10959, 19389, 22199, 23621, 66597, 70863, 84019, 252057, 288587, 510577, 865761, 1531731, 6637501, 19912503]

約数ペア:

[(1, 19912503), (3, 6637501), (13, 1531731), (23, 865761), (39, 510577), (69, 288587), (79, 252057), (237, 84019), (281, 70863), (299, 66597), (843, 23621), (897, 22199), (1027, 19389), (1817, 10959), (3081, 6463), (3653, 5451)]