19651000

素因数分解:

$2^3\times 5^3\times {\mathrm{43}}^1\times {\mathrm{457}}^1$

素因数の和:521

約数の個数: 64

約数和(自身を含む): 47155680

約数和(自身を除く): 27504680

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 43, 50, 86, 100, 125, 172, 200, 215, 250, 344, 430, 457, 500, 860, 914, 1000, 1075, 1720, 1828, 2150, 2285, 3656, 4300, 4570, 5375, 8600, 9140, 10750, 11425, 18280, 19651, 21500, 22850, 39302, 43000, 45700, 57125, 78604, 91400, 98255, 114250, 157208, 196510, 228500, 393020, 457000, 491275, 786040, 982550, 1965100, 2456375, 3930200, 4912750, 9825500, 19651000]

約数ペア:

[(1, 19651000), (2, 9825500), (4, 4912750), (5, 3930200), (8, 2456375), (10, 1965100), (20, 982550), (25, 786040), (40, 491275), (43, 457000), (50, 393020), (86, 228500), (100, 196510), (125, 157208), (172, 114250), (200, 98255), (215, 91400), (250, 78604), (344, 57125), (430, 45700), (457, 43000), (500, 39302), (860, 22850), (914, 21500), (1000, 19651), (1075, 18280), (1720, 11425), (1828, 10750), (2150, 9140), (2285, 8600), (3656, 5375), (4300, 4570)]