20956887

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1607}}^1$

素因数の和:1649

約数の個数: 40

約数和(自身を含む): 37357056

約数和(自身を除く): 16400169

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 483, 567, 621, 1449, 1607, 1863, 4347, 4821, 11249, 13041, 14463, 33747, 36961, 43389, 101241, 110883, 130167, 258727, 303723, 332649, 776181, 911169, 997947, 2328543, 2993841, 6985629, 20956887]

約数ペア:

[(1, 20956887), (3, 6985629), (7, 2993841), (9, 2328543), (21, 997947), (23, 911169), (27, 776181), (63, 332649), (69, 303723), (81, 258727), (161, 130167), (189, 110883), (207, 101241), (483, 43389), (567, 36961), (621, 33747), (1449, 14463), (1607, 13041), (1863, 11249), (4347, 4821)]