20571759

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:141

約数の個数: 64

約数和(自身を含む): 35481600

約数和(自身を除く): 14909841

約数列:

[1, 3, 9, 13, 27, 29, 39, 43, 47, 87, 117, 129, 141, 261, 351, 377, 387, 423, 559, 611, 783, 1131, 1161, 1247, 1269, 1363, 1677, 1833, 2021, 3393, 3741, 4089, 5031, 5499, 6063, 10179, 11223, 12267, 15093, 16211, 16497, 17719, 18189, 26273, 33669, 36801, 48633, 53157, 54567, 58609, 78819, 145899, 159471, 175827, 236457, 437697, 478413, 527481, 709371, 761917, 1582443, 2285751, 6857253, 20571759]

約数ペア:

[(1, 20571759), (3, 6857253), (9, 2285751), (13, 1582443), (27, 761917), (29, 709371), (39, 527481), (43, 478413), (47, 437697), (87, 236457), (117, 175827), (129, 159471), (141, 145899), (261, 78819), (351, 58609), (377, 54567), (387, 53157), (423, 48633), (559, 36801), (611, 33669), (783, 26273), (1131, 18189), (1161, 17719), (1247, 16497), (1269, 16211), (1363, 15093), (1677, 12267), (1833, 11223), (2021, 10179), (3393, 6063), (3741, 5499), (4089, 5031)]