20915475

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{39839}}^1$

素因数の和:39859

約数の個数: 24

約数和(自身を含む): 39521280

約数和(自身を除く): 18605805

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525, 39839, 119517, 199195, 278873, 597585, 836619, 995975, 1394365, 2987925, 4183095, 6971825, 20915475]

約数ペア:

[(1, 20915475), (3, 6971825), (5, 4183095), (7, 2987925), (15, 1394365), (21, 995975), (25, 836619), (35, 597585), (75, 278873), (105, 199195), (175, 119517), (525, 39839)]