21404725

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:501

約数の個数: 24

約数和(自身を含む): 27855360

約数和(自身を除く): 6450635

約数列:

[1, 5, 25, 31, 71, 155, 355, 389, 775, 1775, 1945, 2201, 9725, 11005, 12059, 27619, 55025, 60295, 138095, 301475, 690475, 856189, 4280945, 21404725]

約数ペア:

[(1, 21404725), (5, 4280945), (25, 856189), (31, 690475), (71, 301475), (155, 138095), (355, 60295), (389, 55025), (775, 27619), (1775, 12059), (1945, 11005), (2201, 9725)]