19972880

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8609}}^1$

素因数の和:8651

約数の個数: 40

約数和(自身を含む): 48043800

約数和(自身を除く): 28070920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8609, 17218, 34436, 43045, 68872, 86090, 137744, 172180, 249661, 344360, 499322, 688720, 998644, 1248305, 1997288, 2496610, 3994576, 4993220, 9986440, 19972880]

約数ペア:

[(1, 19972880), (2, 9986440), (4, 4993220), (5, 3994576), (8, 2496610), (10, 1997288), (16, 1248305), (20, 998644), (29, 688720), (40, 499322), (58, 344360), (80, 249661), (116, 172180), (145, 137744), (232, 86090), (290, 68872), (464, 43045), (580, 34436), (1160, 17218), (2320, 8609)]