17771920

素因数分解:

$2^4\times 5^1\times {\mathrm{222149}}^1$

素因数の和:222162

約数の個数: 20

約数和(自身を含む): 41319900

約数和(自身を除く): 23547980

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 222149, 444298, 888596, 1110745, 1777192, 2221490, 3554384, 4442980, 8885960, 17771920]

約数ペア:

[(1, 17771920), (2, 8885960), (4, 4442980), (5, 3554384), (8, 2221490), (10, 1777192), (16, 1110745), (20, 888596), (40, 444298), (80, 222149)]