21510625

素因数分解:

$5^4\times {\mathrm{127}}^1\times {\mathrm{271}}^1$

素因数の和:418

約数の個数: 20

約数和(自身を含む): 27191296

約数和(自身を除く): 5680671

約数列:

[1, 5, 25, 125, 127, 271, 625, 635, 1355, 3175, 6775, 15875, 33875, 34417, 79375, 169375, 172085, 860425, 4302125, 21510625]

約数ペア:

[(1, 21510625), (5, 4302125), (25, 860425), (125, 172085), (127, 169375), (271, 79375), (625, 34417), (635, 33875), (1355, 15875), (3175, 6775)]