21289947

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 33761280

約数和(自身を除く): 12471333

約数列:

[1, 3, 7, 21, 41, 79, 123, 237, 287, 313, 553, 861, 939, 1659, 2191, 3239, 6573, 9717, 12833, 22673, 24727, 38499, 68019, 74181, 89831, 173089, 269493, 519267, 1013807, 3041421, 7096649, 21289947]

約数ペア:

[(1, 21289947), (3, 7096649), (7, 3041421), (21, 1013807), (41, 519267), (79, 269493), (123, 173089), (237, 89831), (287, 74181), (313, 68019), (553, 38499), (861, 24727), (939, 22673), (1659, 12833), (2191, 9717), (3239, 6573)]