21320625

素因数分解:

$3^1\times 5^4\times {\mathrm{83}}^1\times {\mathrm{137}}^1$

素因数の和:243

約数の個数: 40

約数和(自身を含む): 36213408

約数和(自身を除く): 14892783

約数列:

[1, 3, 5, 15, 25, 75, 83, 125, 137, 249, 375, 411, 415, 625, 685, 1245, 1875, 2055, 2075, 3425, 6225, 10275, 10375, 11371, 17125, 31125, 34113, 51375, 51875, 56855, 85625, 155625, 170565, 256875, 284275, 852825, 1421375, 4264125, 7106875, 21320625]

約数ペア:

[(1, 21320625), (3, 7106875), (5, 4264125), (15, 1421375), (25, 852825), (75, 284275), (83, 256875), (125, 170565), (137, 155625), (249, 85625), (375, 56855), (411, 51875), (415, 51375), (625, 34113), (685, 31125), (1245, 17125), (1875, 11371), (2055, 10375), (2075, 10275), (3425, 6225)]