20528775

素因数分解:

$3^3\times 5^2\times {\mathrm{17}}^1\times {\mathrm{1789}}^1$

素因数の和:1825

約数の個数: 48

約数和(自身を含む): 39952800

約数和(自身を除く): 19424025

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 85, 135, 153, 225, 255, 425, 459, 675, 765, 1275, 1789, 2295, 3825, 5367, 8945, 11475, 16101, 26835, 30413, 44725, 48303, 80505, 91239, 134175, 152065, 241515, 273717, 402525, 456195, 760325, 821151, 1207575, 1368585, 2280975, 4105755, 6842925, 20528775]

約数ペア:

[(1, 20528775), (3, 6842925), (5, 4105755), (9, 2280975), (15, 1368585), (17, 1207575), (25, 821151), (27, 760325), (45, 456195), (51, 402525), (75, 273717), (85, 241515), (135, 152065), (153, 134175), (225, 91239), (255, 80505), (425, 48303), (459, 44725), (675, 30413), (765, 26835), (1275, 16101), (1789, 11475), (2295, 8945), (3825, 5367)]