19980320

素因数分解:

$2^5\times 5^1\times {\mathrm{151}}^1\times {\mathrm{827}}^1$

素因数の和:993

約数の個数: 48

約数和(自身を含む): 47573568

約数和(自身を除く): 27593248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 151, 160, 302, 604, 755, 827, 1208, 1510, 1654, 2416, 3020, 3308, 4135, 4832, 6040, 6616, 8270, 12080, 13232, 16540, 24160, 26464, 33080, 66160, 124877, 132320, 249754, 499508, 624385, 999016, 1248770, 1998032, 2497540, 3996064, 4995080, 9990160, 19980320]

約数ペア:

[(1, 19980320), (2, 9990160), (4, 4995080), (5, 3996064), (8, 2497540), (10, 1998032), (16, 1248770), (20, 999016), (32, 624385), (40, 499508), (80, 249754), (151, 132320), (160, 124877), (302, 66160), (604, 33080), (755, 26464), (827, 24160), (1208, 16540), (1510, 13232), (1654, 12080), (2416, 8270), (3020, 6616), (3308, 6040), (4135, 4832)]