20572840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{353}}^1$

素因数の和:442

約数の個数: 64

約数和(自身を含む): 48936960

約数和(自身を除く): 28364120

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 47, 62, 94, 124, 155, 188, 235, 248, 310, 353, 376, 470, 620, 706, 940, 1240, 1412, 1457, 1765, 1880, 2824, 2914, 3530, 5828, 7060, 7285, 10943, 11656, 14120, 14570, 16591, 21886, 29140, 33182, 43772, 54715, 58280, 66364, 82955, 87544, 109430, 132728, 165910, 218860, 331820, 437720, 514321, 663640, 1028642, 2057284, 2571605, 4114568, 5143210, 10286420, 20572840]

約数ペア:

[(1, 20572840), (2, 10286420), (4, 5143210), (5, 4114568), (8, 2571605), (10, 2057284), (20, 1028642), (31, 663640), (40, 514321), (47, 437720), (62, 331820), (94, 218860), (124, 165910), (155, 132728), (188, 109430), (235, 87544), (248, 82955), (310, 66364), (353, 58280), (376, 54715), (470, 43772), (620, 33182), (706, 29140), (940, 21886), (1240, 16591), (1412, 14570), (1457, 14120), (1765, 11656), (1880, 10943), (2824, 7285), (2914, 7060), (3530, 5828)]