21780843

素因数分解:

$3^1\times 7^3\times {\mathrm{61}}^1\times {\mathrm{347}}^1$

素因数の和:432

約数の個数: 32

約数和(自身を含む): 34521600

約数和(自身を除く): 12740757

約数列:

[1, 3, 7, 21, 49, 61, 147, 183, 343, 347, 427, 1029, 1041, 1281, 2429, 2989, 7287, 8967, 17003, 20923, 21167, 51009, 62769, 63501, 119021, 148169, 357063, 444507, 1037183, 3111549, 7260281, 21780843]

約数ペア:

[(1, 21780843), (3, 7260281), (7, 3111549), (21, 1037183), (49, 444507), (61, 357063), (147, 148169), (183, 119021), (343, 63501), (347, 62769), (427, 51009), (1029, 21167), (1041, 20923), (1281, 17003), (2429, 8967), (2989, 7287)]