20657763

素因数分解:

$3^2\times 7^2\times {\mathrm{139}}^1\times {\mathrm{337}}^1$

素因数の和:496

約数の個数: 36

約数和(自身を含む): 35064120

約数和(自身を除く): 14406357

約数列:

[1, 3, 7, 9, 21, 49, 63, 139, 147, 337, 417, 441, 973, 1011, 1251, 2359, 2919, 3033, 6811, 7077, 8757, 16513, 20433, 21231, 46843, 49539, 61299, 140529, 148617, 327901, 421587, 983703, 2295307, 2951109, 6885921, 20657763]

約数ペア:

[(1, 20657763), (3, 6885921), (7, 2951109), (9, 2295307), (21, 983703), (49, 421587), (63, 327901), (139, 148617), (147, 140529), (337, 61299), (417, 49539), (441, 46843), (973, 21231), (1011, 20433), (1251, 16513), (2359, 8757), (2919, 7077), (3033, 6811)]