18279940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{811}}^1$

素因数の和:857

約数の個数: 72

約数和(自身を含む): 46654272

約数和(自身を除く): 28374332

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 811, 980, 1127, 1610, 1622, 2254, 3220, 3244, 4055, 4508, 5635, 5677, 8110, 11270, 11354, 16220, 18653, 22540, 22708, 28385, 37306, 39739, 56770, 74612, 79478, 93265, 113540, 130571, 158956, 186530, 198695, 261142, 373060, 397390, 522284, 652855, 794780, 913997, 1305710, 1827994, 2611420, 3655988, 4569985, 9139970, 18279940]

約数ペア:

[(1, 18279940), (2, 9139970), (4, 4569985), (5, 3655988), (7, 2611420), (10, 1827994), (14, 1305710), (20, 913997), (23, 794780), (28, 652855), (35, 522284), (46, 397390), (49, 373060), (70, 261142), (92, 198695), (98, 186530), (115, 158956), (140, 130571), (161, 113540), (196, 93265), (230, 79478), (245, 74612), (322, 56770), (460, 39739), (490, 37306), (644, 28385), (805, 22708), (811, 22540), (980, 18653), (1127, 16220), (1610, 11354), (1622, 11270), (2254, 8110), (3220, 5677), (3244, 5635), (4055, 4508)]