81958240

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{433}}^1$

素因数の和:481

約数の個数: 144

約数和(自身を含む): 240172128

約数和(自身を除く): 158213888

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, 433, 455, 520, 560, 676, 728, 845, 866, 910, 1040, 1120, 1183, 1352, 1456, 1690, 1732, 1820, 2080, 2165, 2366, 2704, 2912, 3031, 3380, 3464, 3640, 4330, 4732, 5408, 5629, 5915, 6062, 6760, 6928, 7280, 8660, 9464, 11258, 11830, 12124, 13520, 13856, 14560, 15155, 17320, 18928, 22516, 23660, 24248, 27040, 28145, 30310, 34640, 37856, 39403, 45032, 47320, 48496, 56290, 60620, 69280, 73177, 78806, 90064, 94640, 96992, 112580, 121240, 146354, 157612, 180128, 189280, 197015, 225160, 242480, 292708, 315224, 365885, 394030, 450320, 484960, 512239, 585416, 630448, 731770, 788060, 900640, 1024478, 1170832, 1260896, 1463540, 1576120, 2048956, 2341664, 2561195, 2927080, 3152240, 4097912, 5122390, 5854160, 6304480, 8195824, 10244780, 11708320, 16391648, 20489560, 40979120, 81958240]

約数ペア:

[(1, 81958240), (2, 40979120), (4, 20489560), (5, 16391648), (7, 11708320), (8, 10244780), (10, 8195824), (13, 6304480), (14, 5854160), (16, 5122390), (20, 4097912), (26, 3152240), (28, 2927080), (32, 2561195), (35, 2341664), (40, 2048956), (52, 1576120), (56, 1463540), (65, 1260896), (70, 1170832), (80, 1024478), (91, 900640), (104, 788060), (112, 731770), (130, 630448), (140, 585416), (160, 512239), (169, 484960), (182, 450320), (208, 394030), (224, 365885), (260, 315224), (280, 292708), (338, 242480), (364, 225160), (416, 197015), (433, 189280), (455, 180128), (520, 157612), (560, 146354), (676, 121240), (728, 112580), (845, 96992), (866, 94640), (910, 90064), (1040, 78806), (1120, 73177), (1183, 69280), (1352, 60620), (1456, 56290), (1690, 48496), (1732, 47320), (1820, 45032), (2080, 39403), (2165, 37856), (2366, 34640), (2704, 30310), (2912, 28145), (3031, 27040), (3380, 24248), (3464, 23660), (3640, 22516), (4330, 18928), (4732, 17320), (5408, 15155), (5629, 14560), (5915, 13856), (6062, 13520), (6760, 12124), (6928, 11830), (7280, 11258), (8660, 9464)]