20708500

素因数分解:

$2^2\times 5^3\times {\mathrm{83}}^1\times {\mathrm{499}}^1$

素因数の和:601

約数の個数: 48

約数和(自身を含む): 45864000

約数和(自身を除く): 25155500

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 83, 100, 125, 166, 250, 332, 415, 499, 500, 830, 998, 1660, 1996, 2075, 2495, 4150, 4990, 8300, 9980, 10375, 12475, 20750, 24950, 41417, 41500, 49900, 62375, 82834, 124750, 165668, 207085, 249500, 414170, 828340, 1035425, 2070850, 4141700, 5177125, 10354250, 20708500]

約数ペア:

[(1, 20708500), (2, 10354250), (4, 5177125), (5, 4141700), (10, 2070850), (20, 1035425), (25, 828340), (50, 414170), (83, 249500), (100, 207085), (125, 165668), (166, 124750), (250, 82834), (332, 62375), (415, 49900), (499, 41500), (500, 41417), (830, 24950), (998, 20750), (1660, 12475), (1996, 10375), (2075, 9980), (2495, 8300), (4150, 4990)]