21481330

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{1109}}^1$

素因数の和:1278

約数の個数: 32

約数和(自身を含む): 41958000

約数和(自身を除く): 20476670

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 149, 298, 745, 1109, 1490, 1937, 2218, 3874, 5545, 9685, 11090, 14417, 19370, 28834, 72085, 144170, 165241, 330482, 826205, 1652410, 2148133, 4296266, 10740665, 21481330]

約数ペア:

[(1, 21481330), (2, 10740665), (5, 4296266), (10, 2148133), (13, 1652410), (26, 826205), (65, 330482), (130, 165241), (149, 144170), (298, 72085), (745, 28834), (1109, 19370), (1490, 14417), (1937, 11090), (2218, 9685), (3874, 5545)]