18999955

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 7127405

約数列:

[1, 5, 13, 23, 65, 71, 115, 179, 299, 355, 895, 923, 1495, 1633, 2327, 4117, 4615, 8165, 11635, 12709, 20585, 21229, 53521, 63545, 106145, 165217, 267605, 292307, 826085, 1461535, 3799991, 18999955]

約数ペア:

[(1, 18999955), (5, 3799991), (13, 1461535), (23, 826085), (65, 292307), (71, 267605), (115, 165217), (179, 106145), (299, 63545), (355, 53521), (895, 21229), (923, 20585), (1495, 12709), (1633, 11635), (2327, 8165), (4117, 4615)]