21561855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1187}}^1$

素因数の和:1375

約数の個数: 32

約数和(自身を含む): 39688704

約数和(自身を除く): 18126849

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 173, 519, 865, 1187, 1211, 2595, 3561, 3633, 5935, 6055, 8309, 17805, 18165, 24927, 41545, 124635, 205351, 616053, 1026755, 1437457, 3080265, 4312371, 7187285, 21561855]

約数ペア:

[(1, 21561855), (3, 7187285), (5, 4312371), (7, 3080265), (15, 1437457), (21, 1026755), (35, 616053), (105, 205351), (173, 124635), (519, 41545), (865, 24927), (1187, 18165), (1211, 17805), (2595, 8309), (3561, 6055), (3633, 5935)]