1997654320

素因数分解:

$2^4\times 5^1\times {\mathrm{179}}^1\times {\mathrm{139501}}^1$

素因数の和:139693

約数の個数: 40

約数和(自身を含む): 4670526960

約数和(自身を除く): 2672872640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 179, 358, 716, 895, 1432, 1790, 2864, 3580, 7160, 14320, 139501, 279002, 558004, 697505, 1116008, 1395010, 2232016, 2790020, 5580040, 11160080, 24970679, 49941358, 99882716, 124853395, 199765432, 249706790, 399530864, 499413580, 998827160, 1997654320]

約数ペア:

[(1, 1997654320), (2, 998827160), (4, 499413580), (5, 399530864), (8, 249706790), (10, 199765432), (16, 124853395), (20, 99882716), (40, 49941358), (80, 24970679), (179, 11160080), (358, 5580040), (716, 2790020), (895, 2232016), (1432, 1395010), (1790, 1116008), (2864, 697505), (3580, 558004), (7160, 279002), (14320, 139501)]