20755700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:369

約数の個数: 72

約数和(自身を含む): 52080000

約数和(自身を除く): 31324300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 140, 149, 175, 199, 298, 350, 398, 596, 700, 745, 796, 995, 1043, 1393, 1490, 1990, 2086, 2786, 2980, 3725, 3980, 4172, 4975, 5215, 5572, 6965, 7450, 9950, 10430, 13930, 14900, 19900, 20860, 26075, 27860, 29651, 34825, 52150, 59302, 69650, 104300, 118604, 139300, 148255, 207557, 296510, 415114, 593020, 741275, 830228, 1037785, 1482550, 2075570, 2965100, 4151140, 5188925, 10377850, 20755700]

約数ペア:

[(1, 20755700), (2, 10377850), (4, 5188925), (5, 4151140), (7, 2965100), (10, 2075570), (14, 1482550), (20, 1037785), (25, 830228), (28, 741275), (35, 593020), (50, 415114), (70, 296510), (100, 207557), (140, 148255), (149, 139300), (175, 118604), (199, 104300), (298, 69650), (350, 59302), (398, 52150), (596, 34825), (700, 29651), (745, 27860), (796, 26075), (995, 20860), (1043, 19900), (1393, 14900), (1490, 13930), (1990, 10430), (2086, 9950), (2786, 7450), (2980, 6965), (3725, 5572), (3980, 5215), (4172, 4975)]