81579680

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{431}}^1$

素因数の和:479

約数の個数: 144

約数和(自身を含む): 239065344

約数和(自身を除く): 157485664

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 160, 169, 182, 208, 224, 260, 280, 338, 364, 416, 431, 455, 520, 560, 676, 728, 845, 862, 910, 1040, 1120, 1183, 1352, 1456, 1690, 1724, 1820, 2080, 2155, 2366, 2704, 2912, 3017, 3380, 3448, 3640, 4310, 4732, 5408, 5603, 5915, 6034, 6760, 6896, 7280, 8620, 9464, 11206, 11830, 12068, 13520, 13792, 14560, 15085, 17240, 18928, 22412, 23660, 24136, 27040, 28015, 30170, 34480, 37856, 39221, 44824, 47320, 48272, 56030, 60340, 68960, 72839, 78442, 89648, 94640, 96544, 112060, 120680, 145678, 156884, 179296, 189280, 196105, 224120, 241360, 291356, 313768, 364195, 392210, 448240, 482720, 509873, 582712, 627536, 728390, 784420, 896480, 1019746, 1165424, 1255072, 1456780, 1568840, 2039492, 2330848, 2549365, 2913560, 3137680, 4078984, 5098730, 5827120, 6275360, 8157968, 10197460, 11654240, 16315936, 20394920, 40789840, 81579680]

約数ペア:

[(1, 81579680), (2, 40789840), (4, 20394920), (5, 16315936), (7, 11654240), (8, 10197460), (10, 8157968), (13, 6275360), (14, 5827120), (16, 5098730), (20, 4078984), (26, 3137680), (28, 2913560), (32, 2549365), (35, 2330848), (40, 2039492), (52, 1568840), (56, 1456780), (65, 1255072), (70, 1165424), (80, 1019746), (91, 896480), (104, 784420), (112, 728390), (130, 627536), (140, 582712), (160, 509873), (169, 482720), (182, 448240), (208, 392210), (224, 364195), (260, 313768), (280, 291356), (338, 241360), (364, 224120), (416, 196105), (431, 189280), (455, 179296), (520, 156884), (560, 145678), (676, 120680), (728, 112060), (845, 96544), (862, 94640), (910, 89648), (1040, 78442), (1120, 72839), (1183, 68960), (1352, 60340), (1456, 56030), (1690, 48272), (1724, 47320), (1820, 44824), (2080, 39221), (2155, 37856), (2366, 34480), (2704, 30170), (2912, 28015), (3017, 27040), (3380, 24136), (3448, 23660), (3640, 22412), (4310, 18928), (4732, 17240), (5408, 15085), (5603, 14560), (5915, 13792), (6034, 13520), (6760, 12068), (6896, 11830), (7280, 11206), (8620, 9464)]