21580475

素因数分解:

$5^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{971}}^1$

素因数の和:1115

約数の個数: 24

約数和(自身を含む): 30855168

約数和(自身を除く): 9274693

約数列:

[1, 5, 7, 25, 35, 127, 175, 635, 889, 971, 3175, 4445, 4855, 6797, 22225, 24275, 33985, 123317, 169925, 616585, 863219, 3082925, 4316095, 21580475]

約数ペア:

[(1, 21580475), (5, 4316095), (7, 3082925), (25, 863219), (35, 616585), (127, 169925), (175, 123317), (635, 33985), (889, 24275), (971, 22225), (3175, 6797), (4445, 4855)]