21720900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{4259}}^1$

素因数の和:4293

約数の個数: 72

約数和(自身を含む): 66558240

約数和(自身を除く): 44837340

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 25, 30, 34, 50, 51, 60, 68, 75, 85, 100, 102, 150, 170, 204, 255, 300, 340, 425, 510, 850, 1020, 1275, 1700, 2550, 4259, 5100, 8518, 12777, 17036, 21295, 25554, 42590, 51108, 63885, 72403, 85180, 106475, 127770, 144806, 212950, 217209, 255540, 289612, 319425, 362015, 425900, 434418, 638850, 724030, 868836, 1086045, 1277700, 1448060, 1810075, 2172090, 3620150, 4344180, 5430225, 7240300, 10860450, 21720900]

約数ペア:

[(1, 21720900), (2, 10860450), (3, 7240300), (4, 5430225), (5, 4344180), (6, 3620150), (10, 2172090), (12, 1810075), (15, 1448060), (17, 1277700), (20, 1086045), (25, 868836), (30, 724030), (34, 638850), (50, 434418), (51, 425900), (60, 362015), (68, 319425), (75, 289612), (85, 255540), (100, 217209), (102, 212950), (150, 144806), (170, 127770), (204, 106475), (255, 85180), (300, 72403), (340, 63885), (425, 51108), (510, 42590), (850, 25554), (1020, 21295), (1275, 17036), (1700, 12777), (2550, 8518), (4259, 5100)]