21287950

素因数分解:

$2^1\times 5^2\times {\mathrm{37}}^2\times {\mathrm{311}}^1$

素因数の和:397

約数の個数: 36

約数和(自身を含む): 40825512

約数和(自身を除く): 19537562

約数列:

[1, 2, 5, 10, 25, 37, 50, 74, 185, 311, 370, 622, 925, 1369, 1555, 1850, 2738, 3110, 6845, 7775, 11507, 13690, 15550, 23014, 34225, 57535, 68450, 115070, 287675, 425759, 575350, 851518, 2128795, 4257590, 10643975, 21287950]

約数ペア:

[(1, 21287950), (2, 10643975), (5, 4257590), (10, 2128795), (25, 851518), (37, 575350), (50, 425759), (74, 287675), (185, 115070), (311, 68450), (370, 57535), (622, 34225), (925, 23014), (1369, 15550), (1555, 13690), (1850, 11507), (2738, 7775), (3110, 6845)]