21020475

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{40039}}^1$

素因数の和:40059

約数の個数: 24

約数和(自身を含む): 39719680

約数和(自身を除く): 18699205

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525, 40039, 120117, 200195, 280273, 600585, 840819, 1000975, 1401365, 3002925, 4204095, 7006825, 21020475]

約数ペア:

[(1, 21020475), (3, 7006825), (5, 4204095), (7, 3002925), (15, 1401365), (21, 1000975), (25, 840819), (35, 600585), (75, 280273), (105, 200195), (175, 120117), (525, 40039)]