19907720

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1451}}^1$

素因数の和:1483

約数の個数: 64

約数和(自身を含む): 52272000

約数和(自身を除く): 32364280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1451, 1715, 1960, 2744, 2902, 3430, 5804, 6860, 7255, 10157, 11608, 13720, 14510, 20314, 29020, 40628, 50785, 58040, 71099, 81256, 101570, 142198, 203140, 284396, 355495, 406280, 497693, 568792, 710990, 995386, 1421980, 1990772, 2488465, 2843960, 3981544, 4976930, 9953860, 19907720]

約数ペア:

[(1, 19907720), (2, 9953860), (4, 4976930), (5, 3981544), (7, 2843960), (8, 2488465), (10, 1990772), (14, 1421980), (20, 995386), (28, 710990), (35, 568792), (40, 497693), (49, 406280), (56, 355495), (70, 284396), (98, 203140), (140, 142198), (196, 101570), (245, 81256), (280, 71099), (343, 58040), (392, 50785), (490, 40628), (686, 29020), (980, 20314), (1372, 14510), (1451, 13720), (1715, 11608), (1960, 10157), (2744, 7255), (2902, 6860), (3430, 5804)]