21296860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{811}}^1$

素因数の和:934

約数の個数: 48

約数和(自身を含む): 48700512

約数和(自身を除く): 27403652

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 101, 130, 202, 260, 404, 505, 811, 1010, 1313, 1622, 2020, 2626, 3244, 4055, 5252, 6565, 8110, 10543, 13130, 16220, 21086, 26260, 42172, 52715, 81911, 105430, 163822, 210860, 327644, 409555, 819110, 1064843, 1638220, 2129686, 4259372, 5324215, 10648430, 21296860]

約数ペア:

[(1, 21296860), (2, 10648430), (4, 5324215), (5, 4259372), (10, 2129686), (13, 1638220), (20, 1064843), (26, 819110), (52, 409555), (65, 327644), (101, 210860), (130, 163822), (202, 105430), (260, 81911), (404, 52715), (505, 42172), (811, 26260), (1010, 21086), (1313, 16220), (1622, 13130), (2020, 10543), (2626, 8110), (3244, 6565), (4055, 5252)]