19989240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1061}}^1$

素因数の和:1232

約数の個数: 64

約数和(自身を含む): 60406560

約数和(自身を除く): 40417320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 157, 314, 471, 628, 785, 942, 1061, 1256, 1570, 1884, 2122, 2355, 3140, 3183, 3768, 4244, 4710, 5305, 6280, 6366, 8488, 9420, 10610, 12732, 15915, 18840, 21220, 25464, 31830, 42440, 63660, 127320, 166577, 333154, 499731, 666308, 832885, 999462, 1332616, 1665770, 1998924, 2498655, 3331540, 3997848, 4997310, 6663080, 9994620, 19989240]

約数ペア:

[(1, 19989240), (2, 9994620), (3, 6663080), (4, 4997310), (5, 3997848), (6, 3331540), (8, 2498655), (10, 1998924), (12, 1665770), (15, 1332616), (20, 999462), (24, 832885), (30, 666308), (40, 499731), (60, 333154), (120, 166577), (157, 127320), (314, 63660), (471, 42440), (628, 31830), (785, 25464), (942, 21220), (1061, 18840), (1256, 15915), (1570, 12732), (1884, 10610), (2122, 9420), (2355, 8488), (3140, 6366), (3183, 6280), (3768, 5305), (4244, 4710)]