19990760

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7039}}^1$

素因数の和:7121

約数の個数: 32

約数和(自身を含む): 45619200

約数和(自身を除く): 25628440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7039, 14078, 28156, 35195, 56312, 70390, 140780, 281560, 499769, 999538, 1999076, 2498845, 3998152, 4997690, 9995380, 19990760]

約数ペア:

[(1, 19990760), (2, 9995380), (4, 4997690), (5, 3998152), (8, 2498845), (10, 1999076), (20, 999538), (40, 499769), (71, 281560), (142, 140780), (284, 70390), (355, 56312), (568, 35195), (710, 28156), (1420, 14078), (2840, 7039)]