21503225

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{241}}^1$

素因数の和:377

約数の個数: 24

約数和(自身を含む): 27727392

約数和(自身を除く): 6224167

約数列:

[1, 5, 25, 43, 83, 215, 241, 415, 1075, 1205, 2075, 3569, 6025, 10363, 17845, 20003, 51815, 89225, 100015, 259075, 500075, 860129, 4300645, 21503225]

約数ペア:

[(1, 21503225), (5, 4300645), (25, 860129), (43, 500075), (83, 259075), (215, 100015), (241, 89225), (415, 51815), (1075, 20003), (1205, 17845), (2075, 10363), (3569, 6025)]