21425005

素因数分解:

$5^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{557}}^1$

素因数の和:733

約数の個数: 24

約数和(自身を含む): 30152088

約数和(自身を除く): 8727083

約数列:

[1, 5, 7, 35, 49, 157, 245, 557, 785, 1099, 2785, 3899, 5495, 7693, 19495, 27293, 38465, 87449, 136465, 437245, 612143, 3060715, 4285001, 21425005]

約数ペア:

[(1, 21425005), (5, 4285001), (7, 3060715), (35, 612143), (49, 437245), (157, 136465), (245, 87449), (557, 38465), (785, 27293), (1099, 19495), (2785, 7693), (3899, 5495)]