180640720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{431}}^1$

素因数の和:501

約数の個数: 120

約数和(自身を含む): 470541312

約数和(自身を除く): 289900592

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 169, 208, 248, 260, 310, 338, 403, 431, 496, 520, 620, 676, 806, 845, 862, 1040, 1240, 1352, 1612, 1690, 1724, 2015, 2155, 2480, 2704, 3224, 3380, 3448, 4030, 4310, 5239, 5603, 6448, 6760, 6896, 8060, 8620, 10478, 11206, 13361, 13520, 16120, 17240, 20956, 22412, 26195, 26722, 28015, 32240, 34480, 41912, 44824, 52390, 53444, 56030, 66805, 72839, 83824, 89648, 104780, 106888, 112060, 133610, 145678, 173693, 209560, 213776, 224120, 267220, 291356, 347386, 364195, 419120, 448240, 534440, 582712, 694772, 728390, 868465, 1068880, 1165424, 1389544, 1456780, 1736930, 2258009, 2779088, 2913560, 3473860, 4516018, 5827120, 6947720, 9032036, 11290045, 13895440, 18064072, 22580090, 36128144, 45160180, 90320360, 180640720]

約数ペア:

[(1, 180640720), (2, 90320360), (4, 45160180), (5, 36128144), (8, 22580090), (10, 18064072), (13, 13895440), (16, 11290045), (20, 9032036), (26, 6947720), (31, 5827120), (40, 4516018), (52, 3473860), (62, 2913560), (65, 2779088), (80, 2258009), (104, 1736930), (124, 1456780), (130, 1389544), (155, 1165424), (169, 1068880), (208, 868465), (248, 728390), (260, 694772), (310, 582712), (338, 534440), (403, 448240), (431, 419120), (496, 364195), (520, 347386), (620, 291356), (676, 267220), (806, 224120), (845, 213776), (862, 209560), (1040, 173693), (1240, 145678), (1352, 133610), (1612, 112060), (1690, 106888), (1724, 104780), (2015, 89648), (2155, 83824), (2480, 72839), (2704, 66805), (3224, 56030), (3380, 53444), (3448, 52390), (4030, 44824), (4310, 41912), (5239, 34480), (5603, 32240), (6448, 28015), (6760, 26722), (6896, 26195), (8060, 22412), (8620, 20956), (10478, 17240), (11206, 16120), (13361, 13520)]