21920440

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7507}}^1$

素因数の和:7591

約数の個数: 32

約数和(自身を含む): 50003280

約数和(自身を除く): 28082840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7507, 15014, 30028, 37535, 60056, 75070, 150140, 300280, 548011, 1096022, 2192044, 2740055, 4384088, 5480110, 10960220, 21920440]

約数ペア:

[(1, 21920440), (2, 10960220), (4, 5480110), (5, 4384088), (8, 2740055), (10, 2192044), (20, 1096022), (40, 548011), (73, 300280), (146, 150140), (292, 75070), (365, 60056), (584, 37535), (730, 30028), (1460, 15014), (2920, 7507)]