21211011

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{239}}^1$

素因数の和:440

約数の個数: 32

約数和(自身を含む): 33408000

約数和(自身を除く): 12196989

約数列:

[1, 3, 9, 19, 27, 57, 171, 173, 239, 513, 519, 717, 1557, 2151, 3287, 4541, 4671, 6453, 9861, 13623, 29583, 40869, 41347, 88749, 122607, 124041, 372123, 785593, 1116369, 2356779, 7070337, 21211011]

約数ペア:

[(1, 21211011), (3, 7070337), (9, 2356779), (19, 1116369), (27, 785593), (57, 372123), (171, 124041), (173, 122607), (239, 88749), (513, 41347), (519, 40869), (717, 29583), (1557, 13623), (2151, 9861), (3287, 6453), (4541, 4671)]