21891625

素因数分解:

$5^3\times 7^1\times {\mathrm{127}}^1\times {\mathrm{197}}^1$

素因数の和:346

約数の個数: 32

約数和(自身を含む): 31629312

約数和(自身を除く): 9737687

約数列:

[1, 5, 7, 25, 35, 125, 127, 175, 197, 635, 875, 889, 985, 1379, 3175, 4445, 4925, 6895, 15875, 22225, 24625, 25019, 34475, 111125, 125095, 172375, 175133, 625475, 875665, 3127375, 4378325, 21891625]

約数ペア:

[(1, 21891625), (5, 4378325), (7, 3127375), (25, 875665), (35, 625475), (125, 175133), (127, 172375), (175, 125095), (197, 111125), (635, 34475), (875, 25019), (889, 24625), (985, 22225), (1379, 15875), (3175, 6895), (4445, 4925)]