20618715

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2459}}^1$

素因数の和:2523

約数の個数: 32

約数和(自身を含む): 36368640

約数和(自身を除く): 15749925

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 195, 215, 559, 645, 1677, 2459, 2795, 7377, 8385, 12295, 31967, 36885, 95901, 105737, 159835, 317211, 479505, 528685, 1374581, 1586055, 4123743, 6872905, 20618715]

約数ペア:

[(1, 20618715), (3, 6872905), (5, 4123743), (13, 1586055), (15, 1374581), (39, 528685), (43, 479505), (65, 317211), (129, 159835), (195, 105737), (215, 95901), (559, 36885), (645, 31967), (1677, 12295), (2459, 8385), (2795, 7377)]