21121317

素因数分解:

$3^6\times 7^1\times {\mathrm{4139}}^1$

素因数の和:4164

約数の個数: 28

約数和(自身を含む): 36200160

約数和(自身を除く): 15078843

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 4139, 5103, 12417, 28973, 37251, 86919, 111753, 260757, 335259, 782271, 1005777, 2346813, 3017331, 7040439, 21121317]

約数ペア:

[(1, 21121317), (3, 7040439), (7, 3017331), (9, 2346813), (21, 1005777), (27, 782271), (63, 335259), (81, 260757), (189, 111753), (243, 86919), (567, 37251), (729, 28973), (1701, 12417), (4139, 5103)]