16821405

素因数分解:

$3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{2351}}^1$

素因数の和:2418

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 13660515

約数列:

[1, 3, 5, 9, 15, 27, 45, 53, 135, 159, 265, 477, 795, 1431, 2351, 2385, 7053, 7155, 11755, 21159, 35265, 63477, 105795, 124603, 317385, 373809, 623015, 1121427, 1869045, 3364281, 5607135, 16821405]

約数ペア:

[(1, 16821405), (3, 5607135), (5, 3364281), (9, 1869045), (15, 1121427), (27, 623015), (45, 373809), (53, 317385), (135, 124603), (159, 105795), (265, 63477), (477, 35265), (795, 21159), (1431, 11755), (2351, 7155), (2385, 7053)]