21420525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{40801}}^1$

素因数の和:40821

約数の個数: 24

約数和(自身を含む): 40475584

約数和(自身を除く): 19055059

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525, 40801, 122403, 204005, 285607, 612015, 856821, 1020025, 1428035, 3060075, 4284105, 7140175, 21420525]

約数ペア:

[(1, 21420525), (3, 7140175), (5, 4284105), (7, 3060075), (15, 1428035), (21, 1020025), (25, 856821), (35, 612015), (75, 285607), (105, 204005), (175, 122403), (525, 40801)]