20718100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{15937}}^1$

素因数の和:15964

約数の個数: 36

約数和(自身を含む): 48419644

約数和(自身を除く): 27701544

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 15937, 31874, 63748, 79685, 159370, 207181, 318740, 398425, 414362, 796850, 828724, 1035905, 1593700, 2071810, 4143620, 5179525, 10359050, 20718100]

約数ペア:

[(1, 20718100), (2, 10359050), (4, 5179525), (5, 4143620), (10, 2071810), (13, 1593700), (20, 1035905), (25, 828724), (26, 796850), (50, 414362), (52, 398425), (65, 318740), (100, 207181), (130, 159370), (260, 79685), (325, 63748), (650, 31874), (1300, 15937)]