21013125

素因数分解:

$3^1\times 5^4\times 7^1\times {\mathrm{1601}}^1$

素因数の和:1631

約数の個数: 40

約数和(自身を含む): 40037184

約数和(自身を除く): 19024059

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 125, 175, 375, 525, 625, 875, 1601, 1875, 2625, 4375, 4803, 8005, 11207, 13125, 24015, 33621, 40025, 56035, 120075, 168105, 200125, 280175, 600375, 840525, 1000625, 1400875, 3001875, 4202625, 7004375, 21013125]

約数ペア:

[(1, 21013125), (3, 7004375), (5, 4202625), (7, 3001875), (15, 1400875), (21, 1000625), (25, 840525), (35, 600375), (75, 280175), (105, 200125), (125, 168105), (175, 120075), (375, 56035), (525, 40025), (625, 33621), (875, 24015), (1601, 13125), (1875, 11207), (2625, 8005), (4375, 4803)]