21124145

素因数分解:

$5^1\times 7^2\times {\mathrm{151}}^1\times {\mathrm{571}}^1$

素因数の和:741

約数の個数: 24

約数和(自身を含む): 29734848

約数和(自身を除く): 8610703

約数列:

[1, 5, 7, 35, 49, 151, 245, 571, 755, 1057, 2855, 3997, 5285, 7399, 19985, 27979, 36995, 86221, 139895, 431105, 603547, 3017735, 4224829, 21124145]

約数ペア:

[(1, 21124145), (5, 4224829), (7, 3017735), (35, 603547), (49, 431105), (151, 139895), (245, 86221), (571, 36995), (755, 27979), (1057, 19985), (2855, 7399), (3997, 5285)]