21215007

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1171}}^1$

素因数の和:1252

約数の個数: 32

約数和(自身を含む): 34878720

約数和(自身を除く): 13663713

約数列:

[1, 3, 9, 11, 27, 33, 61, 99, 183, 297, 549, 671, 1171, 1647, 2013, 3513, 6039, 10539, 12881, 18117, 31617, 38643, 71431, 115929, 214293, 347787, 642879, 785741, 1928637, 2357223, 7071669, 21215007]

約数ペア:

[(1, 21215007), (3, 7071669), (9, 2357223), (11, 1928637), (27, 785741), (33, 642879), (61, 347787), (99, 214293), (183, 115929), (297, 71431), (549, 38643), (671, 31617), (1171, 18117), (1647, 12881), (2013, 10539), (3513, 6039)]