18187239

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{263}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 10704921

約数列:

[1, 3, 7, 21, 37, 89, 111, 259, 263, 267, 623, 777, 789, 1841, 1869, 3293, 5523, 9731, 9879, 23051, 23407, 29193, 68117, 69153, 70221, 163849, 204351, 491547, 866059, 2598177, 6062413, 18187239]

約数ペア:

[(1, 18187239), (3, 6062413), (7, 2598177), (21, 866059), (37, 491547), (89, 204351), (111, 163849), (259, 70221), (263, 69153), (267, 68117), (623, 29193), (777, 23407), (789, 23051), (1841, 9879), (1869, 9731), (3293, 5523)]