20821131

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{163}}^1$

素因数の和:277

約数の個数: 40

約数和(自身を含む): 33337920

約数和(自身を除く): 12516789

約数列:

[1, 3, 9, 19, 27, 57, 81, 83, 163, 171, 249, 489, 513, 747, 1467, 1539, 1577, 2241, 3097, 4401, 4731, 6723, 9291, 13203, 13529, 14193, 27873, 40587, 42579, 83619, 121761, 127737, 250857, 257051, 365283, 771153, 1095849, 2313459, 6940377, 20821131]

約数ペア:

[(1, 20821131), (3, 6940377), (9, 2313459), (19, 1095849), (27, 771153), (57, 365283), (81, 257051), (83, 250857), (163, 127737), (171, 121761), (249, 83619), (489, 42579), (513, 40587), (747, 27873), (1467, 14193), (1539, 13529), (1577, 13203), (2241, 9291), (3097, 6723), (4401, 4731)]