21251125

素因数分解:

$5^3\times 7^1\times {\mathrm{149}}^1\times {\mathrm{163}}^1$

素因数の和:334

約数の個数: 32

約数和(自身を含む): 30700800

約数和(自身を除く): 9449675

約数列:

[1, 5, 7, 25, 35, 125, 149, 163, 175, 745, 815, 875, 1043, 1141, 3725, 4075, 5215, 5705, 18625, 20375, 24287, 26075, 28525, 121435, 130375, 142625, 170009, 607175, 850045, 3035875, 4250225, 21251125]

約数ペア:

[(1, 21251125), (5, 4250225), (7, 3035875), (25, 850045), (35, 607175), (125, 170009), (149, 142625), (163, 130375), (175, 121435), (745, 28525), (815, 26075), (875, 24287), (1043, 20375), (1141, 18625), (3725, 5705), (4075, 5215)]