89740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{641}}^1$

素因数の和:657

約数の個数: 24

約数和(自身を含む): 215712

約数和(自身を除く): 125972

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 641, 1282, 2564, 3205, 4487, 6410, 8974, 12820, 17948, 22435, 44870, 89740]

約数ペア:

[(1, 89740), (2, 44870), (4, 22435), (5, 17948), (7, 12820), (10, 8974), (14, 6410), (20, 4487), (28, 3205), (35, 2564), (70, 1282), (140, 641)]