20988620

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{251}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 45849888

約数和(自身を除く): 24861268

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 113, 148, 185, 226, 251, 370, 452, 502, 565, 740, 1004, 1130, 1255, 2260, 2510, 4181, 5020, 8362, 9287, 16724, 18574, 20905, 28363, 37148, 41810, 46435, 56726, 83620, 92870, 113452, 141815, 185740, 283630, 567260, 1049431, 2098862, 4197724, 5247155, 10494310, 20988620]

約数ペア:

[(1, 20988620), (2, 10494310), (4, 5247155), (5, 4197724), (10, 2098862), (20, 1049431), (37, 567260), (74, 283630), (113, 185740), (148, 141815), (185, 113452), (226, 92870), (251, 83620), (370, 56726), (452, 46435), (502, 41810), (565, 37148), (740, 28363), (1004, 20905), (1130, 18574), (1255, 16724), (2260, 9287), (2510, 8362), (4181, 5020)]