18851885

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:257

約数の個数: 32

約数和(自身を含む): 25734240

約数和(自身を除く): 6882355

約数列:

[1, 5, 13, 29, 65, 73, 137, 145, 365, 377, 685, 949, 1781, 1885, 2117, 3973, 4745, 8905, 10001, 10585, 19865, 27521, 50005, 51649, 130013, 137605, 258245, 290029, 650065, 1450145, 3770377, 18851885]

約数ペア:

[(1, 18851885), (5, 3770377), (13, 1450145), (29, 650065), (65, 290029), (73, 258245), (137, 137605), (145, 130013), (365, 51649), (377, 50005), (685, 27521), (949, 19865), (1781, 10585), (1885, 10001), (2117, 8905), (3973, 4745)]