19968725

素因数分解:

$5^2\times 7^2\times {\mathrm{16301}}^1$

素因数の和:16325

約数の個数: 18

約数和(自身を含む): 28805634

約数和(自身を除く): 8836909

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 16301, 81505, 114107, 407525, 570535, 798749, 2852675, 3993745, 19968725]

約数ペア:

[(1, 19968725), (5, 3993745), (7, 2852675), (25, 798749), (35, 570535), (49, 407525), (175, 114107), (245, 81505), (1225, 16301)]