21193005

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1307}}^1$

素因数の和:1385

約数の個数: 32

約数和(自身を含む): 36163584

約数和(自身を除く): 14970579

約数列:

[1, 3, 5, 15, 23, 47, 69, 115, 141, 235, 345, 705, 1081, 1307, 3243, 3921, 5405, 6535, 16215, 19605, 30061, 61429, 90183, 150305, 184287, 307145, 450915, 921435, 1412867, 4238601, 7064335, 21193005]

約数ペア:

[(1, 21193005), (3, 7064335), (5, 4238601), (15, 1412867), (23, 921435), (47, 450915), (69, 307145), (115, 184287), (141, 150305), (235, 90183), (345, 61429), (705, 30061), (1081, 19605), (1307, 16215), (3243, 6535), (3921, 5405)]