21040515

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{701}}^1$

素因数の和:764

約数の個数: 48

約数和(自身を含む): 39424320

約数和(自身を除く): 18383805

約数列:

[1, 3, 5, 9, 15, 23, 29, 45, 69, 87, 115, 145, 207, 261, 345, 435, 667, 701, 1035, 1305, 2001, 2103, 3335, 3505, 6003, 6309, 10005, 10515, 16123, 20329, 30015, 31545, 48369, 60987, 80615, 101645, 145107, 182961, 241845, 304935, 467567, 725535, 914805, 1402701, 2337835, 4208103, 7013505, 21040515]

約数ペア:

[(1, 21040515), (3, 7013505), (5, 4208103), (9, 2337835), (15, 1402701), (23, 914805), (29, 725535), (45, 467567), (69, 304935), (87, 241845), (115, 182961), (145, 145107), (207, 101645), (261, 80615), (345, 60987), (435, 48369), (667, 31545), (701, 30015), (1035, 20329), (1305, 16123), (2001, 10515), (2103, 10005), (3335, 6309), (3505, 6003)]