399778860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{512537}}^1$

素因数の和:512562

約数の個数: 48

約数和(自身を含む): 1205489376

約数和(自身を除く): 805710516

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 512537, 1025074, 1537611, 2050148, 2562685, 3075222, 5125370, 6150444, 6662981, 7688055, 10250740, 13325962, 15376110, 19988943, 26651924, 30752220, 33314905, 39977886, 66629810, 79955772, 99944715, 133259620, 199889430, 399778860]

約数ペア:

[(1, 399778860), (2, 199889430), (3, 133259620), (4, 99944715), (5, 79955772), (6, 66629810), (10, 39977886), (12, 33314905), (13, 30752220), (15, 26651924), (20, 19988943), (26, 15376110), (30, 13325962), (39, 10250740), (52, 7688055), (60, 6662981), (65, 6150444), (78, 5125370), (130, 3075222), (156, 2562685), (195, 2050148), (260, 1537611), (390, 1025074), (780, 512537)]