18729975

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{311}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 34354944

約数和(自身を除く): 15624969

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 73, 75, 165, 219, 275, 311, 365, 803, 825, 933, 1095, 1555, 1825, 2409, 3421, 4015, 4665, 5475, 7775, 10263, 12045, 17105, 20075, 22703, 23325, 51315, 60225, 68109, 85525, 113515, 249733, 256575, 340545, 567575, 749199, 1248665, 1702725, 3745995, 6243325, 18729975]

約数ペア:

[(1, 18729975), (3, 6243325), (5, 3745995), (11, 1702725), (15, 1248665), (25, 749199), (33, 567575), (55, 340545), (73, 256575), (75, 249733), (165, 113515), (219, 85525), (275, 68109), (311, 60225), (365, 51315), (803, 23325), (825, 22703), (933, 20075), (1095, 17105), (1555, 12045), (1825, 10263), (2409, 7775), (3421, 5475), (4015, 4665)]