20219480

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1013}}^1$

素因数の和:1523

約数の個数: 32

約数和(自身を含む): 45630000

約数和(自身を除く): 25410520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1013, 1996, 2026, 2495, 3992, 4052, 4990, 5065, 8104, 9980, 10130, 19960, 20260, 40520, 505487, 1010974, 2021948, 2527435, 4043896, 5054870, 10109740, 20219480]

約数ペア:

[(1, 20219480), (2, 10109740), (4, 5054870), (5, 4043896), (8, 2527435), (10, 2021948), (20, 1010974), (40, 505487), (499, 40520), (998, 20260), (1013, 19960), (1996, 10130), (2026, 9980), (2495, 8104), (3992, 5065), (4052, 4990)]