20416978040

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{491}}^1\times {\mathrm{13159}}^1$

素因数の和:13740

約数の個数: 64

約数和(自身を含む): 46617984000

約数和(自身を除く): 26201005960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 491, 632, 790, 982, 1580, 1964, 2455, 3160, 3928, 4910, 9820, 13159, 19640, 26318, 38789, 52636, 65795, 77578, 105272, 131590, 155156, 193945, 263180, 310312, 387890, 526360, 775780, 1039561, 1551560, 2079122, 4158244, 5197805, 6461069, 8316488, 10395610, 12922138, 20791220, 25844276, 32305345, 41582440, 51688552, 64610690, 129221380, 258442760, 510424451, 1020848902, 2041697804, 2552122255, 4083395608, 5104244510, 10208489020, 20416978040]

約数ペア:

[(1, 20416978040), (2, 10208489020), (4, 5104244510), (5, 4083395608), (8, 2552122255), (10, 2041697804), (20, 1020848902), (40, 510424451), (79, 258442760), (158, 129221380), (316, 64610690), (395, 51688552), (491, 41582440), (632, 32305345), (790, 25844276), (982, 20791220), (1580, 12922138), (1964, 10395610), (2455, 8316488), (3160, 6461069), (3928, 5197805), (4910, 4158244), (9820, 2079122), (13159, 1551560), (19640, 1039561), (26318, 775780), (38789, 526360), (52636, 387890), (65795, 310312), (77578, 263180), (105272, 193945), (131590, 155156)]