19947760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:398

約数の個数: 80

約数和(自身を含む): 53568000

約数和(自身を除く): 33620240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 179, 199, 280, 358, 398, 560, 716, 796, 895, 995, 1253, 1393, 1432, 1592, 1790, 1990, 2506, 2786, 2864, 3184, 3580, 3980, 5012, 5572, 6265, 6965, 7160, 7960, 10024, 11144, 12530, 13930, 14320, 15920, 20048, 22288, 25060, 27860, 35621, 50120, 55720, 71242, 100240, 111440, 142484, 178105, 249347, 284968, 356210, 498694, 569936, 712420, 997388, 1246735, 1424840, 1994776, 2493470, 2849680, 3989552, 4986940, 9973880, 19947760]

約数ペア:

[(1, 19947760), (2, 9973880), (4, 4986940), (5, 3989552), (7, 2849680), (8, 2493470), (10, 1994776), (14, 1424840), (16, 1246735), (20, 997388), (28, 712420), (35, 569936), (40, 498694), (56, 356210), (70, 284968), (80, 249347), (112, 178105), (140, 142484), (179, 111440), (199, 100240), (280, 71242), (358, 55720), (398, 50120), (560, 35621), (716, 27860), (796, 25060), (895, 22288), (995, 20048), (1253, 15920), (1393, 14320), (1432, 13930), (1592, 12530), (1790, 11144), (1990, 10024), (2506, 7960), (2786, 7160), (2864, 6965), (3184, 6265), (3580, 5572), (3980, 5012)]