21477925

素因数分解:

$5^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:310

約数の個数: 36

約数和(自身を含む): 31487940

約数和(自身を除く): 10010015

約数列:

[1, 5, 7, 25, 35, 49, 89, 175, 197, 245, 445, 623, 985, 1225, 1379, 2225, 3115, 4361, 4925, 6895, 9653, 15575, 17533, 21805, 34475, 48265, 87665, 109025, 122731, 241325, 438325, 613655, 859117, 3068275, 4295585, 21477925]

約数ペア:

[(1, 21477925), (5, 4295585), (7, 3068275), (25, 859117), (35, 613655), (49, 438325), (89, 241325), (175, 122731), (197, 109025), (245, 87665), (445, 48265), (623, 34475), (985, 21805), (1225, 17533), (1379, 15575), (2225, 9653), (3115, 6895), (4361, 4925)]