21147159

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{113}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 31912704

約数和(自身を除く): 10765545

約数列:

[1, 3, 11, 33, 53, 107, 113, 159, 321, 339, 583, 1177, 1243, 1749, 3531, 3729, 5671, 5989, 12091, 17013, 17967, 36273, 62381, 65879, 133001, 187143, 197637, 399003, 640823, 1922469, 7049053, 21147159]

約数ペア:

[(1, 21147159), (3, 7049053), (11, 1922469), (33, 640823), (53, 399003), (107, 197637), (113, 187143), (159, 133001), (321, 65879), (339, 62381), (583, 36273), (1177, 17967), (1243, 17013), (1749, 12091), (3531, 5989), (3729, 5671)]