17991990

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1801}}^1$

素因数の和:1854

約数の個数: 64

約数和(自身を含む): 49302720

約数和(自身を除く): 31310730

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 37, 45, 54, 74, 90, 111, 135, 185, 222, 270, 333, 370, 555, 666, 999, 1110, 1665, 1801, 1998, 3330, 3602, 4995, 5403, 9005, 9990, 10806, 16209, 18010, 27015, 32418, 48627, 54030, 66637, 81045, 97254, 133274, 162090, 199911, 243135, 333185, 399822, 486270, 599733, 666370, 999555, 1199466, 1799199, 1999110, 2998665, 3598398, 5997330, 8995995, 17991990]

約数ペア:

[(1, 17991990), (2, 8995995), (3, 5997330), (5, 3598398), (6, 2998665), (9, 1999110), (10, 1799199), (15, 1199466), (18, 999555), (27, 666370), (30, 599733), (37, 486270), (45, 399822), (54, 333185), (74, 243135), (90, 199911), (111, 162090), (135, 133274), (185, 97254), (222, 81045), (270, 66637), (333, 54030), (370, 48627), (555, 32418), (666, 27015), (999, 18010), (1110, 16209), (1665, 10806), (1801, 9990), (1998, 9005), (3330, 5403), (3602, 4995)]