21389211

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{463}}^1$

素因数の和:560

約数の個数: 32

約数和(自身を含む): 33408000

約数和(自身を除く): 12018789

約数列:

[1, 3, 9, 27, 29, 59, 87, 177, 261, 463, 531, 783, 1389, 1593, 1711, 4167, 5133, 12501, 13427, 15399, 27317, 40281, 46197, 81951, 120843, 245853, 362529, 737559, 792193, 2376579, 7129737, 21389211]

約数ペア:

[(1, 21389211), (3, 7129737), (9, 2376579), (27, 792193), (29, 737559), (59, 362529), (87, 245853), (177, 120843), (261, 81951), (463, 46197), (531, 40281), (783, 27317), (1389, 15399), (1593, 13427), (1711, 12501), (4167, 5133)]