18990990

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1901}}^1$

素因数の和:1954

約数の個数: 64

約数和(自身を含む): 52038720

約数和(自身を除く): 33047730

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, 1901, 1998, 3330, 3802, 4995, 5703, 9505, 9990, 11406, 17109, 19010, 28515, 34218, 51327, 57030, 70337, 85545, 102654, 140674, 171090, 211011, 256635, 351685, 422022, 513270, 633033, 703370, 1055055, 1266066, 1899099, 2110110, 3165165, 3798198, 6330330, 9495495, 18990990]

約数ペア:

[(1, 18990990), (2, 9495495), (3, 6330330), (5, 3798198), (6, 3165165), (9, 2110110), (10, 1899099), (15, 1266066), (18, 1055055), (27, 703370), (30, 633033), (37, 513270), (45, 422022), (54, 351685), (74, 256635), (90, 211011), (111, 171090), (135, 140674), (185, 102654), (222, 85545), (270, 70337), (333, 57030), (370, 51327), (555, 34218), (666, 28515), (999, 19010), (1110, 17109), (1665, 11406), (1901, 9990), (1998, 9505), (3330, 5703), (3802, 4995)]