21387975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{40739}}^1$

素因数の和:40759

約数の個数: 24

約数和(自身を含む): 40414080

約数和(自身を除く): 19026105

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525, 40739, 122217, 203695, 285173, 611085, 855519, 1018475, 1425865, 3055425, 4277595, 7129325, 21387975]

約数ペア:

[(1, 21387975), (3, 7129325), (5, 4277595), (7, 3055425), (15, 1425865), (21, 1018475), (25, 855519), (35, 611085), (75, 285173), (105, 203695), (175, 122217), (525, 40739)]