81189940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312269}}^1$

素因数の和:312291

約数の個数: 24

約数和(自身を含む): 183614760

約数和(自身を除く): 102424820

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312269, 624538, 1249076, 1561345, 3122690, 4059497, 6245380, 8118994, 16237988, 20297485, 40594970, 81189940]

約数ペア:

[(1, 81189940), (2, 40594970), (4, 20297485), (5, 16237988), (10, 8118994), (13, 6245380), (20, 4059497), (26, 3122690), (52, 1561345), (65, 1249076), (130, 624538), (260, 312269)]