21500215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{9091}}^1$

素因数の和:9150

約数の個数: 16

約数和(自身を含む): 28803456

約数和(自身を除く): 7303241

約数列:

[1, 5, 11, 43, 55, 215, 473, 2365, 9091, 45455, 100001, 390913, 500005, 1954565, 4300043, 21500215]

約数ペア:

[(1, 21500215), (5, 4300043), (11, 1954565), (43, 500005), (55, 390913), (215, 100001), (473, 45455), (2365, 9091)]