21896255

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 29248128

約数和(自身を除く): 7351873

約数列:

[1, 5, 17, 41, 61, 85, 103, 205, 305, 515, 697, 1037, 1751, 2501, 3485, 4223, 5185, 6283, 8755, 12505, 21115, 31415, 42517, 71791, 106811, 212585, 257603, 358955, 534055, 1288015, 4379251, 21896255]

約数ペア:

[(1, 21896255), (5, 4379251), (17, 1288015), (41, 534055), (61, 358955), (85, 257603), (103, 212585), (205, 106811), (305, 71791), (515, 42517), (697, 31415), (1037, 21115), (1751, 12505), (2501, 8755), (3485, 6283), (4223, 5185)]