21271900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16363}}^1$

素因数の和:16390

約数の個数: 36

約数和(自身を含む): 49713832

約数和(自身を除く): 28441932

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16363, 32726, 65452, 81815, 163630, 212719, 327260, 409075, 425438, 818150, 850876, 1063595, 1636300, 2127190, 4254380, 5317975, 10635950, 21271900]

約数ペア:

[(1, 21271900), (2, 10635950), (4, 5317975), (5, 4254380), (10, 2127190), (13, 1636300), (20, 1063595), (25, 850876), (26, 818150), (50, 425438), (52, 409075), (65, 327260), (100, 212719), (130, 163630), (260, 81815), (325, 65452), (650, 32726), (1300, 16363)]