21584725

素因数分解:

$5^2\times {\mathrm{89}}^2\times {\mathrm{109}}^1$

素因数の和:297

約数の個数: 18

約数和(自身を含む): 27317510

約数和(自身を除く): 5732785

約数列:

[1, 5, 25, 89, 109, 445, 545, 2225, 2725, 7921, 9701, 39605, 48505, 198025, 242525, 863389, 4316945, 21584725]

約数ペア:

[(1, 21584725), (5, 4316945), (25, 863389), (89, 242525), (109, 198025), (445, 48505), (545, 39605), (2225, 9701), (2725, 7921)]