21103509

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{227}}^1\times {\mathrm{233}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 34145280

約数和(自身を除く): 13041771

約数列:

[1, 3, 7, 19, 21, 57, 133, 227, 233, 399, 681, 699, 1589, 1631, 4313, 4427, 4767, 4893, 12939, 13281, 30191, 30989, 52891, 90573, 92967, 158673, 370237, 1004929, 1110711, 3014787, 7034503, 21103509]

約数ペア:

[(1, 21103509), (3, 7034503), (7, 3014787), (19, 1110711), (21, 1004929), (57, 370237), (133, 158673), (227, 92967), (233, 90573), (399, 52891), (681, 30989), (699, 30191), (1589, 13281), (1631, 12939), (4313, 4893), (4427, 4767)]