21008312

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{2557}}^1$

素因数の和:2655

約数の個数: 32

約数和(自身を含む): 42974400

約数和(自身を除く): 21966088

約数列:

[1, 2, 4, 8, 13, 26, 52, 79, 104, 158, 316, 632, 1027, 2054, 2557, 4108, 5114, 8216, 10228, 20456, 33241, 66482, 132964, 202003, 265928, 404006, 808012, 1616024, 2626039, 5252078, 10504156, 21008312]

約数ペア:

[(1, 21008312), (2, 10504156), (4, 5252078), (8, 2626039), (13, 1616024), (26, 808012), (52, 404006), (79, 265928), (104, 202003), (158, 132964), (316, 66482), (632, 33241), (1027, 20456), (2054, 10228), (2557, 8216), (4108, 5114)]