21012966

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{809}}^1$

素因数の和:870

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 30697434

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 37, 39, 54, 74, 78, 111, 117, 222, 234, 333, 351, 481, 666, 702, 809, 962, 999, 1443, 1618, 1998, 2427, 2886, 4329, 4854, 7281, 8658, 10517, 12987, 14562, 21034, 21843, 25974, 29933, 31551, 43686, 59866, 63102, 89799, 94653, 179598, 189306, 269397, 283959, 389129, 538794, 567918, 778258, 808191, 1167387, 1616382, 2334774, 3502161, 7004322, 10506483, 21012966]

約数ペア:

[(1, 21012966), (2, 10506483), (3, 7004322), (6, 3502161), (9, 2334774), (13, 1616382), (18, 1167387), (26, 808191), (27, 778258), (37, 567918), (39, 538794), (54, 389129), (74, 283959), (78, 269397), (111, 189306), (117, 179598), (222, 94653), (234, 89799), (333, 63102), (351, 59866), (481, 43686), (666, 31551), (702, 29933), (809, 25974), (962, 21843), (999, 21034), (1443, 14562), (1618, 12987), (1998, 10517), (2427, 8658), (2886, 7281), (4329, 4854)]