78156981

素因数分解:

$3^4\times 7^1\times {\mathrm{307}}^1\times {\mathrm{449}}^1$

素因数の和:775

約数の個数: 40

約数和(自身を含む): 134164800

約数和(自身を除く): 56007819

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 307, 449, 567, 921, 1347, 2149, 2763, 3143, 4041, 6447, 8289, 9429, 12123, 19341, 24867, 28287, 36369, 58023, 84861, 137843, 174069, 254583, 413529, 964901, 1240587, 2894703, 3721761, 8684109, 11165283, 26052327, 78156981]

約数ペア:

[(1, 78156981), (3, 26052327), (7, 11165283), (9, 8684109), (21, 3721761), (27, 2894703), (63, 1240587), (81, 964901), (189, 413529), (307, 254583), (449, 174069), (567, 137843), (921, 84861), (1347, 58023), (2149, 36369), (2763, 28287), (3143, 24867), (4041, 19341), (6447, 12123), (8289, 9429)]