20471600

素因数分解:

$2^4\times 5^2\times {\mathrm{61}}^1\times {\mathrm{839}}^1$

素因数の和:918

約数の個数: 60

約数和(自身を含む): 50048880

約数和(自身を除く): 29577280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 61, 80, 100, 122, 200, 244, 305, 400, 488, 610, 839, 976, 1220, 1525, 1678, 2440, 3050, 3356, 4195, 4880, 6100, 6712, 8390, 12200, 13424, 16780, 20975, 24400, 33560, 41950, 51179, 67120, 83900, 102358, 167800, 204716, 255895, 335600, 409432, 511790, 818864, 1023580, 1279475, 2047160, 2558950, 4094320, 5117900, 10235800, 20471600]

約数ペア:

[(1, 20471600), (2, 10235800), (4, 5117900), (5, 4094320), (8, 2558950), (10, 2047160), (16, 1279475), (20, 1023580), (25, 818864), (40, 511790), (50, 409432), (61, 335600), (80, 255895), (100, 204716), (122, 167800), (200, 102358), (244, 83900), (305, 67120), (400, 51179), (488, 41950), (610, 33560), (839, 24400), (976, 20975), (1220, 16780), (1525, 13424), (1678, 12200), (2440, 8390), (3050, 6712), (3356, 6100), (4195, 4880)]