21990180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21559}}^1$

素因数の和:21588

約数の個数: 48

約数和(自身を含む): 65197440

約数和(自身を除く): 43207260

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 21559, 43118, 64677, 86236, 107795, 129354, 215590, 258708, 323385, 366503, 431180, 646770, 733006, 1099509, 1293540, 1466012, 1832515, 2199018, 3665030, 4398036, 5497545, 7330060, 10995090, 21990180]

約数ペア:

[(1, 21990180), (2, 10995090), (3, 7330060), (4, 5497545), (5, 4398036), (6, 3665030), (10, 2199018), (12, 1832515), (15, 1466012), (17, 1293540), (20, 1099509), (30, 733006), (34, 646770), (51, 431180), (60, 366503), (68, 323385), (85, 258708), (102, 215590), (170, 129354), (204, 107795), (255, 86236), (340, 64677), (510, 43118), (1020, 21559)]