21154725

素因数分解:

$3^2\times 5^2\times {\mathrm{167}}^1\times {\mathrm{563}}^1$

素因数の和:746

約数の個数: 36

約数和(自身を含む): 38185056

約数和(自身を除く): 17030331

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 167, 225, 501, 563, 835, 1503, 1689, 2505, 2815, 4175, 5067, 7515, 8445, 12525, 14075, 25335, 37575, 42225, 94021, 126675, 282063, 470105, 846189, 1410315, 2350525, 4230945, 7051575, 21154725]

約数ペア:

[(1, 21154725), (3, 7051575), (5, 4230945), (9, 2350525), (15, 1410315), (25, 846189), (45, 470105), (75, 282063), (167, 126675), (225, 94021), (501, 42225), (563, 37575), (835, 25335), (1503, 14075), (1689, 12525), (2505, 8445), (2815, 7515), (4175, 5067)]