19908915

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{193}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 36046752

約数和(自身を除く): 16137837

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 193, 195, 299, 345, 529, 579, 897, 965, 1495, 1587, 2509, 2645, 2895, 4439, 4485, 6877, 7527, 7935, 12545, 13317, 20631, 22195, 34385, 37635, 57707, 66585, 102097, 103155, 173121, 288535, 306291, 510485, 865605, 1327261, 1531455, 3981783, 6636305, 19908915]

約数ペア:

[(1, 19908915), (3, 6636305), (5, 3981783), (13, 1531455), (15, 1327261), (23, 865605), (39, 510485), (65, 306291), (69, 288535), (115, 173121), (193, 103155), (195, 102097), (299, 66585), (345, 57707), (529, 37635), (579, 34385), (897, 22195), (965, 20631), (1495, 13317), (1587, 12545), (2509, 7935), (2645, 7527), (2895, 6877), (4439, 4485)]