21428145

素因数分解:

$3^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{337}}^1$

素因数の和:511

約数の個数: 40

約数和(自身を含む): 38771304

約数和(自身を除く): 17343159

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 157, 337, 405, 471, 785, 1011, 1413, 1685, 2355, 3033, 4239, 5055, 7065, 9099, 12717, 15165, 21195, 27297, 45495, 52909, 63585, 136485, 158727, 264545, 476181, 793635, 1428543, 2380905, 4285629, 7142715, 21428145]

約数ペア:

[(1, 21428145), (3, 7142715), (5, 4285629), (9, 2380905), (15, 1428543), (27, 793635), (45, 476181), (81, 264545), (135, 158727), (157, 136485), (337, 63585), (405, 52909), (471, 45495), (785, 27297), (1011, 21195), (1413, 15165), (1685, 12717), (2355, 9099), (3033, 7065), (4239, 5055)]