18981740

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{227}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 41483232

約数和(自身を除く): 22501492

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 113, 148, 185, 226, 227, 370, 452, 454, 565, 740, 908, 1130, 1135, 2260, 2270, 4181, 4540, 8362, 8399, 16724, 16798, 20905, 25651, 33596, 41810, 41995, 51302, 83620, 83990, 102604, 128255, 167980, 256510, 513020, 949087, 1898174, 3796348, 4745435, 9490870, 18981740]

約数ペア:

[(1, 18981740), (2, 9490870), (4, 4745435), (5, 3796348), (10, 1898174), (20, 949087), (37, 513020), (74, 256510), (113, 167980), (148, 128255), (185, 102604), (226, 83990), (227, 83620), (370, 51302), (452, 41995), (454, 41810), (565, 33596), (740, 25651), (908, 20905), (1130, 16798), (1135, 16724), (2260, 8399), (2270, 8362), (4181, 4540)]