21142485

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1721}}^1$

素因数の和:1755

約数の個数: 64

約数和(自身を含む): 46287360

約数和(自身を除く): 25144875

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 63, 65, 91, 105, 117, 135, 189, 195, 273, 315, 351, 455, 585, 819, 945, 1365, 1721, 1755, 2457, 4095, 5163, 8605, 12047, 12285, 15489, 22373, 25815, 36141, 46467, 60235, 67119, 77445, 108423, 111865, 156611, 180705, 201357, 232335, 325269, 335595, 469833, 542115, 604071, 783055, 1006785, 1409499, 1626345, 2349165, 3020355, 4228497, 7047495, 21142485]

約数ペア:

[(1, 21142485), (3, 7047495), (5, 4228497), (7, 3020355), (9, 2349165), (13, 1626345), (15, 1409499), (21, 1006785), (27, 783055), (35, 604071), (39, 542115), (45, 469833), (63, 335595), (65, 325269), (91, 232335), (105, 201357), (117, 180705), (135, 156611), (189, 111865), (195, 108423), (273, 77445), (315, 67119), (351, 60235), (455, 46467), (585, 36141), (819, 25815), (945, 22373), (1365, 15489), (1721, 12285), (1755, 12047), (2457, 8605), (4095, 5163)]