20199759640

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{277}}^1\times {\mathrm{491}}^1$

素因数の和:905

約数の個数: 128

約数和(自身を含む): 47269785600

約数和(自身を除く): 27070025960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 79, 94, 158, 188, 235, 277, 316, 376, 395, 470, 491, 554, 632, 790, 940, 982, 1108, 1385, 1580, 1880, 1964, 2216, 2455, 2770, 3160, 3713, 3928, 4910, 5540, 7426, 9820, 11080, 13019, 14852, 18565, 19640, 21883, 23077, 26038, 29704, 37130, 38789, 43766, 46154, 52076, 65095, 74260, 77578, 87532, 92308, 104152, 109415, 115385, 130190, 136007, 148520, 155156, 175064, 184616, 193945, 218830, 230770, 260380, 272014, 310312, 387890, 437660, 461540, 520760, 544028, 680035, 775780, 875320, 923080, 1028501, 1088056, 1360070, 1551560, 1823083, 2057002, 2720140, 3646166, 4114004, 5142505, 5440280, 6392329, 7292332, 8228008, 9115415, 10285010, 10744553, 12784658, 14584664, 18230830, 20570020, 21489106, 25569316, 31961645, 36461660, 41140040, 42978212, 51138632, 53722765, 63923290, 72923320, 85956424, 107445530, 127846580, 214891060, 255693160, 429782120, 504993991, 1009987982, 2019975964, 2524969955, 4039951928, 5049939910, 10099879820, 20199759640]

約数ペア:

[(1, 20199759640), (2, 10099879820), (4, 5049939910), (5, 4039951928), (8, 2524969955), (10, 2019975964), (20, 1009987982), (40, 504993991), (47, 429782120), (79, 255693160), (94, 214891060), (158, 127846580), (188, 107445530), (235, 85956424), (277, 72923320), (316, 63923290), (376, 53722765), (395, 51138632), (470, 42978212), (491, 41140040), (554, 36461660), (632, 31961645), (790, 25569316), (940, 21489106), (982, 20570020), (1108, 18230830), (1385, 14584664), (1580, 12784658), (1880, 10744553), (1964, 10285010), (2216, 9115415), (2455, 8228008), (2770, 7292332), (3160, 6392329), (3713, 5440280), (3928, 5142505), (4910, 4114004), (5540, 3646166), (7426, 2720140), (9820, 2057002), (11080, 1823083), (13019, 1551560), (14852, 1360070), (18565, 1088056), (19640, 1028501), (21883, 923080), (23077, 875320), (26038, 775780), (29704, 680035), (37130, 544028), (38789, 520760), (43766, 461540), (46154, 437660), (52076, 387890), (65095, 310312), (74260, 272014), (77578, 260380), (87532, 230770), (92308, 218830), (104152, 193945), (109415, 184616), (115385, 175064), (130190, 155156), (136007, 148520)]