21377980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82223}}^1$

素因数の和:82245

約数の個数: 24

約数和(自身を含む): 48347712

約数和(自身を除く): 26969732

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82223, 164446, 328892, 411115, 822230, 1068899, 1644460, 2137798, 4275596, 5344495, 10688990, 21377980]

約数ペア:

[(1, 21377980), (2, 10688990), (4, 5344495), (5, 4275596), (10, 2137798), (13, 1644460), (20, 1068899), (26, 822230), (52, 411115), (65, 328892), (130, 164446), (260, 82223)]