21242475

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{4969}}^1$

素因数の和:5004

約数の個数: 36

約数和(自身を含む): 40058200

約数和(自身を除く): 18815725

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 475, 855, 1425, 4275, 4969, 14907, 24845, 44721, 74535, 94411, 124225, 223605, 283233, 372675, 472055, 849699, 1118025, 1416165, 2360275, 4248495, 7080825, 21242475]

約数ペア:

[(1, 21242475), (3, 7080825), (5, 4248495), (9, 2360275), (15, 1416165), (19, 1118025), (25, 849699), (45, 472055), (57, 372675), (75, 283233), (95, 223605), (171, 124225), (225, 94411), (285, 74535), (475, 44721), (855, 24845), (1425, 14907), (4275, 4969)]