20783560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{373}}^1$

素因数の和:590

約数の個数: 64

約数和(自身を含む): 53856000

約数和(自身を除く): 33072440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 199, 280, 373, 398, 746, 796, 995, 1393, 1492, 1592, 1865, 1990, 2611, 2786, 2984, 3730, 3980, 5222, 5572, 6965, 7460, 7960, 10444, 11144, 13055, 13930, 14920, 20888, 26110, 27860, 52220, 55720, 74227, 104440, 148454, 296908, 371135, 519589, 593816, 742270, 1039178, 1484540, 2078356, 2597945, 2969080, 4156712, 5195890, 10391780, 20783560]

約数ペア:

[(1, 20783560), (2, 10391780), (4, 5195890), (5, 4156712), (7, 2969080), (8, 2597945), (10, 2078356), (14, 1484540), (20, 1039178), (28, 742270), (35, 593816), (40, 519589), (56, 371135), (70, 296908), (140, 148454), (199, 104440), (280, 74227), (373, 55720), (398, 52220), (746, 27860), (796, 26110), (995, 20888), (1393, 14920), (1492, 13930), (1592, 13055), (1865, 11144), (1990, 10444), (2611, 7960), (2786, 7460), (2984, 6965), (3730, 5572), (3980, 5222)]