18915039

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:130

約数の個数: 80

約数和(自身を含む): 35126784

約数和(自身を除く): 16211745

約数列:

[1, 3, 9, 11, 13, 23, 27, 33, 39, 69, 71, 81, 99, 117, 143, 207, 213, 253, 297, 299, 351, 429, 621, 639, 759, 781, 891, 897, 923, 1053, 1287, 1633, 1863, 1917, 2277, 2343, 2691, 2769, 3289, 3861, 4899, 5751, 6831, 7029, 8073, 8307, 9867, 10153, 11583, 14697, 17963, 20493, 21087, 21229, 24219, 24921, 29601, 30459, 44091, 53889, 63261, 63687, 74763, 88803, 91377, 132273, 161667, 191061, 233519, 266409, 274131, 485001, 573183, 700557, 822393, 1455003, 1719549, 2101671, 6305013, 18915039]

約数ペア:

[(1, 18915039), (3, 6305013), (9, 2101671), (11, 1719549), (13, 1455003), (23, 822393), (27, 700557), (33, 573183), (39, 485001), (69, 274131), (71, 266409), (81, 233519), (99, 191061), (117, 161667), (143, 132273), (207, 91377), (213, 88803), (253, 74763), (297, 63687), (299, 63261), (351, 53889), (429, 44091), (621, 30459), (639, 29601), (759, 24921), (781, 24219), (891, 21229), (897, 21087), (923, 20493), (1053, 17963), (1287, 14697), (1633, 11583), (1863, 10153), (1917, 9867), (2277, 8307), (2343, 8073), (2691, 7029), (2769, 6831), (3289, 5751), (3861, 4899)]