21220131

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{359}}^1$

素因数の和:459

約数の個数: 32

約数和(自身を含む): 32140800

約数和(自身を除く): 10920669

約数列:

[1, 3, 17, 19, 51, 57, 61, 183, 323, 359, 969, 1037, 1077, 1159, 3111, 3477, 6103, 6821, 18309, 19703, 20463, 21899, 59109, 65697, 115957, 347871, 372283, 416081, 1116849, 1248243, 7073377, 21220131]

約数ペア:

[(1, 21220131), (3, 7073377), (17, 1248243), (19, 1116849), (51, 416081), (57, 372283), (61, 347871), (183, 115957), (323, 65697), (359, 59109), (969, 21899), (1037, 20463), (1077, 19703), (1159, 18309), (3111, 6821), (3477, 6103)]