81567640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{373}}^1$

素因数の和:473

約数の個数: 128

約数和(自身を含む): 232657920

約数和(自身を除く): 151090280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 71, 77, 88, 110, 140, 142, 154, 220, 280, 284, 308, 355, 373, 385, 440, 497, 568, 616, 710, 746, 770, 781, 994, 1420, 1492, 1540, 1562, 1865, 1988, 2485, 2611, 2840, 2984, 3080, 3124, 3730, 3905, 3976, 4103, 4970, 5222, 5467, 6248, 7460, 7810, 8206, 9940, 10444, 10934, 13055, 14920, 15620, 16412, 19880, 20515, 20888, 21868, 26110, 26483, 27335, 28721, 31240, 32824, 41030, 43736, 52220, 52966, 54670, 57442, 82060, 104440, 105932, 109340, 114884, 132415, 143605, 164120, 185381, 211864, 218680, 229768, 264830, 287210, 291313, 370762, 529660, 574420, 582626, 741524, 926905, 1059320, 1148840, 1165252, 1456565, 1483048, 1853810, 2039191, 2330504, 2913130, 3707620, 4078382, 5826260, 7415240, 8156764, 10195955, 11652520, 16313528, 20391910, 40783820, 81567640]

約数ペア:

[(1, 81567640), (2, 40783820), (4, 20391910), (5, 16313528), (7, 11652520), (8, 10195955), (10, 8156764), (11, 7415240), (14, 5826260), (20, 4078382), (22, 3707620), (28, 2913130), (35, 2330504), (40, 2039191), (44, 1853810), (55, 1483048), (56, 1456565), (70, 1165252), (71, 1148840), (77, 1059320), (88, 926905), (110, 741524), (140, 582626), (142, 574420), (154, 529660), (220, 370762), (280, 291313), (284, 287210), (308, 264830), (355, 229768), (373, 218680), (385, 211864), (440, 185381), (497, 164120), (568, 143605), (616, 132415), (710, 114884), (746, 109340), (770, 105932), (781, 104440), (994, 82060), (1420, 57442), (1492, 54670), (1540, 52966), (1562, 52220), (1865, 43736), (1988, 41030), (2485, 32824), (2611, 31240), (2840, 28721), (2984, 27335), (3080, 26483), (3124, 26110), (3730, 21868), (3905, 20888), (3976, 20515), (4103, 19880), (4970, 16412), (5222, 15620), (5467, 14920), (6248, 13055), (7460, 10934), (7810, 10444), (8206, 9940)]