21015774

素因数分解:

$2^1\times 3^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{587}}^1$

素因数の和:631

約数の個数: 80

約数和(自身を含む): 53787888

約数和(自身を除く): 32772114

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 27, 34, 39, 51, 54, 78, 81, 102, 117, 153, 162, 221, 234, 306, 351, 442, 459, 587, 663, 702, 918, 1053, 1174, 1326, 1377, 1761, 1989, 2106, 2754, 3522, 3978, 5283, 5967, 7631, 9979, 10566, 11934, 15262, 15849, 17901, 19958, 22893, 29937, 31698, 35802, 45786, 47547, 59874, 68679, 89811, 95094, 129727, 137358, 179622, 206037, 259454, 269433, 389181, 412074, 538866, 618111, 778362, 808299, 1167543, 1236222, 1616598, 2335086, 3502629, 7005258, 10507887, 21015774]

約数ペア:

[(1, 21015774), (2, 10507887), (3, 7005258), (6, 3502629), (9, 2335086), (13, 1616598), (17, 1236222), (18, 1167543), (26, 808299), (27, 778362), (34, 618111), (39, 538866), (51, 412074), (54, 389181), (78, 269433), (81, 259454), (102, 206037), (117, 179622), (153, 137358), (162, 129727), (221, 95094), (234, 89811), (306, 68679), (351, 59874), (442, 47547), (459, 45786), (587, 35802), (663, 31698), (702, 29937), (918, 22893), (1053, 19958), (1174, 17901), (1326, 15849), (1377, 15262), (1761, 11934), (1989, 10566), (2106, 9979), (2754, 7631), (3522, 5967), (3978, 5283)]