78905140

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{307}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 169513344

約数和(自身を除く): 90608204

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 181, 284, 307, 355, 362, 614, 710, 724, 905, 1228, 1420, 1535, 1810, 3070, 3620, 6140, 12851, 21797, 25702, 43594, 51404, 55567, 64255, 87188, 108985, 111134, 128510, 217970, 222268, 257020, 277835, 435940, 555670, 1111340, 3945257, 7890514, 15781028, 19726285, 39452570, 78905140]

約数ペア:

[(1, 78905140), (2, 39452570), (4, 19726285), (5, 15781028), (10, 7890514), (20, 3945257), (71, 1111340), (142, 555670), (181, 435940), (284, 277835), (307, 257020), (355, 222268), (362, 217970), (614, 128510), (710, 111134), (724, 108985), (905, 87188), (1228, 64255), (1420, 55567), (1535, 51404), (1810, 43594), (3070, 25702), (3620, 21797), (6140, 12851)]