21189275

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1439}}^1$

素因数の和:1499

約数の個数: 24

約数和(自身を含む): 28569600

約数和(自身を除く): 7380325

約数列:

[1, 5, 19, 25, 31, 95, 155, 475, 589, 775, 1439, 2945, 7195, 14725, 27341, 35975, 44609, 136705, 223045, 683525, 847571, 1115225, 4237855, 21189275]

約数ペア:

[(1, 21189275), (5, 4237855), (19, 1115225), (25, 847571), (31, 683525), (95, 223045), (155, 136705), (475, 44609), (589, 35975), (775, 27341), (1439, 14725), (2945, 7195)]