17880821973

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{28759}}^1$

素因数の和:28982

約数の個数: 48

約数和(自身を含む): 30149683200

約数和(自身を除く): 12268861227

約数列:

[1, 3, 7, 9, 21, 63, 71, 139, 213, 417, 497, 639, 973, 1251, 1491, 2919, 4473, 8757, 9869, 28759, 29607, 69083, 86277, 88821, 201313, 207249, 258831, 603939, 621747, 1811817, 2041889, 3997501, 6125667, 11992503, 14293223, 18377001, 27982507, 35977509, 42879669, 83947521, 128639007, 251842563, 283822571, 851467713, 1986757997, 2554403139, 5960273991, 17880821973]

約数ペア:

[(1, 17880821973), (3, 5960273991), (7, 2554403139), (9, 1986757997), (21, 851467713), (63, 283822571), (71, 251842563), (139, 128639007), (213, 83947521), (417, 42879669), (497, 35977509), (639, 27982507), (973, 18377001), (1251, 14293223), (1491, 11992503), (2919, 6125667), (4473, 3997501), (8757, 2041889), (9869, 1811817), (28759, 621747), (29607, 603939), (69083, 258831), (86277, 207249), (88821, 201313)]