21055325

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{2333}}^1$

素因数の和:2381

約数の個数: 18

約数和(自身を含む): 27566874

約数和(自身を除く): 6511549

約数列:

[1, 5, 19, 25, 95, 361, 475, 1805, 2333, 9025, 11665, 44327, 58325, 221635, 842213, 1108175, 4211065, 21055325]

約数ペア:

[(1, 21055325), (5, 4211065), (19, 1108175), (25, 842213), (95, 221635), (361, 58325), (475, 44327), (1805, 11665), (2333, 9025)]