20799320

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9811}}^1$

素因数の和:9875

約数の個数: 32

約数和(自身を含む): 47686320

約数和(自身を除く): 26887000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9811, 19622, 39244, 49055, 78488, 98110, 196220, 392440, 519983, 1039966, 2079932, 2599915, 4159864, 5199830, 10399660, 20799320]

約数ペア:

[(1, 20799320), (2, 10399660), (4, 5199830), (5, 4159864), (8, 2599915), (10, 2079932), (20, 1039966), (40, 519983), (53, 392440), (106, 196220), (212, 98110), (265, 78488), (424, 49055), (530, 39244), (1060, 19622), (2120, 9811)]