18543905

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 24883200

約数和(自身を除く): 6339295

約数列:

[1, 5, 19, 29, 53, 95, 127, 145, 265, 551, 635, 1007, 1537, 2413, 2755, 3683, 5035, 6731, 7685, 12065, 18415, 29203, 33655, 69977, 127889, 146015, 195199, 349885, 639445, 975995, 3708781, 18543905]

約数ペア:

[(1, 18543905), (5, 3708781), (19, 975995), (29, 639445), (53, 349885), (95, 195199), (127, 146015), (145, 127889), (265, 69977), (551, 33655), (635, 29203), (1007, 18415), (1537, 12065), (2413, 7685), (2755, 6731), (3683, 5035)]