18905320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{269}}^1$

素因数の和:538

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 30083480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 251, 269, 280, 502, 538, 1004, 1076, 1255, 1345, 1757, 1883, 2008, 2152, 2510, 2690, 3514, 3766, 5020, 5380, 7028, 7532, 8785, 9415, 10040, 10760, 14056, 15064, 17570, 18830, 35140, 37660, 67519, 70280, 75320, 135038, 270076, 337595, 472633, 540152, 675190, 945266, 1350380, 1890532, 2363165, 2700760, 3781064, 4726330, 9452660, 18905320]

約数ペア:

[(1, 18905320), (2, 9452660), (4, 4726330), (5, 3781064), (7, 2700760), (8, 2363165), (10, 1890532), (14, 1350380), (20, 945266), (28, 675190), (35, 540152), (40, 472633), (56, 337595), (70, 270076), (140, 135038), (251, 75320), (269, 70280), (280, 67519), (502, 37660), (538, 35140), (1004, 18830), (1076, 17570), (1255, 15064), (1345, 14056), (1757, 10760), (1883, 10040), (2008, 9415), (2152, 8785), (2510, 7532), (2690, 7028), (3514, 5380), (3766, 5020)]