21031815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{6907}}^1$

素因数の和:6951

約数の個数: 32

約数和(自身を含む): 39790080

約数和(自身を除く): 18758265

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 87, 105, 145, 203, 435, 609, 1015, 3045, 6907, 20721, 34535, 48349, 103605, 145047, 200303, 241745, 600909, 725235, 1001515, 1402121, 3004545, 4206363, 7010605, 21031815]

約数ペア:

[(1, 21031815), (3, 7010605), (5, 4206363), (7, 3004545), (15, 1402121), (21, 1001515), (29, 725235), (35, 600909), (87, 241745), (105, 200303), (145, 145047), (203, 103605), (435, 48349), (609, 34535), (1015, 20721), (3045, 6907)]