18961047

素因数分解:

$3^5\times 7^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:250

約数の個数: 48

約数和(自身を含む): 33126912

約数和(自身を除く): 14165865

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 81, 157, 189, 213, 243, 471, 497, 567, 639, 1099, 1413, 1491, 1701, 1917, 3297, 4239, 4473, 5751, 9891, 11147, 12717, 13419, 17253, 29673, 33441, 38151, 40257, 78029, 89019, 100323, 120771, 234087, 267057, 300969, 702261, 902907, 2106783, 2708721, 6320349, 18961047]

約数ペア:

[(1, 18961047), (3, 6320349), (7, 2708721), (9, 2106783), (21, 902907), (27, 702261), (63, 300969), (71, 267057), (81, 234087), (157, 120771), (189, 100323), (213, 89019), (243, 78029), (471, 40257), (497, 38151), (567, 33441), (639, 29673), (1099, 17253), (1413, 13419), (1491, 12717), (1701, 11147), (1917, 9891), (3297, 5751), (4239, 4473)]