21665295

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6781}}^1$

素因数の和:6863

約数の個数: 24

約数和(自身を含む): 38087712

約数和(自身を除く): 16422417

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6781, 20343, 33905, 61029, 101715, 305145, 481451, 1444353, 2407255, 4333059, 7221765, 21665295]

約数ペア:

[(1, 21665295), (3, 7221765), (5, 4333059), (9, 2407255), (15, 1444353), (45, 481451), (71, 305145), (213, 101715), (355, 61029), (639, 33905), (1065, 20343), (3195, 6781)]