20787705

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3581}}^1$

素因数の和:3638

約数の個数: 32

約数和(自身を含む): 37825920

約数和(自身を除く): 17038215

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 129, 135, 215, 387, 645, 1161, 1935, 3581, 5805, 10743, 17905, 32229, 53715, 96687, 153983, 161145, 461949, 483435, 769915, 1385847, 2309745, 4157541, 6929235, 20787705]

約数ペア:

[(1, 20787705), (3, 6929235), (5, 4157541), (9, 2309745), (15, 1385847), (27, 769915), (43, 483435), (45, 461949), (129, 161145), (135, 153983), (215, 96687), (387, 53715), (645, 32229), (1161, 17905), (1935, 10743), (3581, 5805)]