19905760

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2539}}^1$

素因数の和:2568

約数の個数: 72

約数和(自身を含む): 54726840

約数和(自身を除く): 34821080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2539, 3920, 5078, 7840, 10156, 12695, 17773, 20312, 25390, 35546, 40624, 50780, 71092, 81248, 88865, 101560, 124411, 142184, 177730, 203120, 248822, 284368, 355460, 406240, 497644, 568736, 622055, 710920, 995288, 1244110, 1421840, 1990576, 2488220, 2843680, 3981152, 4976440, 9952880, 19905760]

約数ペア:

[(1, 19905760), (2, 9952880), (4, 4976440), (5, 3981152), (7, 2843680), (8, 2488220), (10, 1990576), (14, 1421840), (16, 1244110), (20, 995288), (28, 710920), (32, 622055), (35, 568736), (40, 497644), (49, 406240), (56, 355460), (70, 284368), (80, 248822), (98, 203120), (112, 177730), (140, 142184), (160, 124411), (196, 101560), (224, 88865), (245, 81248), (280, 71092), (392, 50780), (490, 40624), (560, 35546), (784, 25390), (980, 20312), (1120, 17773), (1568, 12695), (1960, 10156), (2539, 7840), (3920, 5078)]