18898749

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 30825600

約数和(自身を除く): 11926851

約数列:

[1, 3, 9, 19, 29, 37, 57, 87, 103, 111, 171, 261, 309, 333, 551, 703, 927, 1073, 1653, 1957, 2109, 2987, 3219, 3811, 4959, 5871, 6327, 8961, 9657, 11433, 17613, 20387, 26883, 34299, 56753, 61161, 72409, 110519, 170259, 183483, 217227, 331557, 510777, 651681, 994671, 2099861, 6299583, 18898749]

約数ペア:

[(1, 18898749), (3, 6299583), (9, 2099861), (19, 994671), (29, 651681), (37, 510777), (57, 331557), (87, 217227), (103, 183483), (111, 170259), (171, 110519), (261, 72409), (309, 61161), (333, 56753), (551, 34299), (703, 26883), (927, 20387), (1073, 17613), (1653, 11433), (1957, 9657), (2109, 8961), (2987, 6327), (3219, 5871), (3811, 4959)]