21237160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1039}}^1$

素因数の和:1130

約数の個数: 64

約数和(自身を含む): 55411200

約数和(自身を除く): 34174040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 1022, 1039, 1460, 2044, 2078, 2555, 2920, 4088, 4156, 5110, 5195, 7273, 8312, 10220, 10390, 14546, 20440, 20780, 29092, 36365, 41560, 58184, 72730, 75847, 145460, 151694, 290920, 303388, 379235, 530929, 606776, 758470, 1061858, 1516940, 2123716, 2654645, 3033880, 4247432, 5309290, 10618580, 21237160]

約数ペア:

[(1, 21237160), (2, 10618580), (4, 5309290), (5, 4247432), (7, 3033880), (8, 2654645), (10, 2123716), (14, 1516940), (20, 1061858), (28, 758470), (35, 606776), (40, 530929), (56, 379235), (70, 303388), (73, 290920), (140, 151694), (146, 145460), (280, 75847), (292, 72730), (365, 58184), (511, 41560), (584, 36365), (730, 29092), (1022, 20780), (1039, 20440), (1460, 14546), (2044, 10390), (2078, 10220), (2555, 8312), (2920, 7273), (4088, 5195), (4156, 5110)]