1681940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6469}}^1$

素因数の和:6491

約数の個数: 24

約数和(自身を含む): 3804360

約数和(自身を除く): 2122420

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 6469, 12938, 25876, 32345, 64690, 84097, 129380, 168194, 336388, 420485, 840970, 1681940]

約数ペア:

[(1, 1681940), (2, 840970), (4, 420485), (5, 336388), (10, 168194), (13, 129380), (20, 84097), (26, 64690), (52, 32345), (65, 25876), (130, 12938), (260, 6469)]