20751957

素因数分解:

$3^5\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 33546240

約数和(自身を除く): 12794283

約数列:

[1, 3, 9, 23, 27, 47, 69, 79, 81, 141, 207, 237, 243, 423, 621, 711, 1081, 1269, 1817, 1863, 2133, 3243, 3713, 3807, 5451, 5589, 6399, 9729, 11139, 11421, 16353, 19197, 29187, 33417, 49059, 85399, 87561, 100251, 147177, 256197, 262683, 300753, 441531, 768591, 902259, 2305773, 6917319, 20751957]

約数ペア:

[(1, 20751957), (3, 6917319), (9, 2305773), (23, 902259), (27, 768591), (47, 441531), (69, 300753), (79, 262683), (81, 256197), (141, 147177), (207, 100251), (237, 87561), (243, 85399), (423, 49059), (621, 33417), (711, 29187), (1081, 19197), (1269, 16353), (1817, 11421), (1863, 11139), (2133, 9729), (3243, 6399), (3713, 5589), (3807, 5451)]