21791025

素因数分解:

$3^5\times 5^2\times {\mathrm{17}}^1\times {\mathrm{211}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 43059744

約数和(自身を除く): 21268719

約数列:

[1, 3, 5, 9, 15, 17, 25, 27, 45, 51, 75, 81, 85, 135, 153, 211, 225, 243, 255, 405, 425, 459, 633, 675, 765, 1055, 1215, 1275, 1377, 1899, 2025, 2295, 3165, 3587, 3825, 4131, 5275, 5697, 6075, 6885, 9495, 10761, 11475, 15825, 17091, 17935, 20655, 28485, 32283, 34425, 47475, 51273, 53805, 85455, 89675, 96849, 103275, 142425, 161415, 256365, 269025, 290547, 427275, 484245, 807075, 871641, 1281825, 1452735, 2421225, 4358205, 7263675, 21791025]

約数ペア:

[(1, 21791025), (3, 7263675), (5, 4358205), (9, 2421225), (15, 1452735), (17, 1281825), (25, 871641), (27, 807075), (45, 484245), (51, 427275), (75, 290547), (81, 269025), (85, 256365), (135, 161415), (153, 142425), (211, 103275), (225, 96849), (243, 89675), (255, 85455), (405, 53805), (425, 51273), (459, 47475), (633, 34425), (675, 32283), (765, 28485), (1055, 20655), (1215, 17935), (1275, 17091), (1377, 15825), (1899, 11475), (2025, 10761), (2295, 9495), (3165, 6885), (3587, 6075), (3825, 5697), (4131, 5275)]