21300625

素因数分解:

$5^4\times {\mathrm{173}}^1\times {\mathrm{197}}^1$

素因数の和:390

約数の個数: 20

約数和(自身を含む): 26907012

約数和(自身を除く): 5606387

約数列:

[1, 5, 25, 125, 173, 197, 625, 865, 985, 4325, 4925, 21625, 24625, 34081, 108125, 123125, 170405, 852025, 4260125, 21300625]

約数ペア:

[(1, 21300625), (5, 4260125), (25, 852025), (125, 170405), (173, 123125), (197, 108125), (625, 34081), (865, 24625), (985, 21625), (4325, 4925)]