20318961

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1613}}^1$

素因数の和:1665

約数の個数: 32

約数和(自身を含む): 32538240

約数和(自身を除く): 12219279

約数列:

[1, 3, 13, 17, 19, 39, 51, 57, 221, 247, 323, 663, 741, 969, 1613, 4199, 4839, 12597, 20969, 27421, 30647, 62907, 82263, 91941, 356473, 398411, 520999, 1069419, 1195233, 1562997, 6772987, 20318961]

約数ペア:

[(1, 20318961), (3, 6772987), (13, 1562997), (17, 1195233), (19, 1069419), (39, 520999), (51, 398411), (57, 356473), (221, 91941), (247, 82263), (323, 62907), (663, 30647), (741, 27421), (969, 20969), (1613, 12597), (4199, 4839)]