18789940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72269}}^1$

素因数の和:72291

約数の個数: 24

約数和(自身を含む): 42494760

約数和(自身を除く): 23704820

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72269, 144538, 289076, 361345, 722690, 939497, 1445380, 1878994, 3757988, 4697485, 9394970, 18789940]

約数ペア:

[(1, 18789940), (2, 9394970), (4, 4697485), (5, 3757988), (10, 1878994), (13, 1445380), (20, 939497), (26, 722690), (52, 361345), (65, 289076), (130, 144538), (260, 72269)]