81321520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7643}}^1$

素因数の和:7682

約数の個数: 80

約数和(自身を含む): 227485440

約数和(自身を除く): 146163920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 2128, 2660, 5320, 7643, 10640, 15286, 30572, 38215, 53501, 61144, 76430, 107002, 122288, 145217, 152860, 214004, 267505, 290434, 305720, 428008, 535010, 580868, 611440, 726085, 856016, 1016519, 1070020, 1161736, 1452170, 2033038, 2140040, 2323472, 2904340, 4066076, 4280080, 5082595, 5808680, 8132152, 10165190, 11617360, 16264304, 20330380, 40660760, 81321520]

約数ペア:

[(1, 81321520), (2, 40660760), (4, 20330380), (5, 16264304), (7, 11617360), (8, 10165190), (10, 8132152), (14, 5808680), (16, 5082595), (19, 4280080), (20, 4066076), (28, 2904340), (35, 2323472), (38, 2140040), (40, 2033038), (56, 1452170), (70, 1161736), (76, 1070020), (80, 1016519), (95, 856016), (112, 726085), (133, 611440), (140, 580868), (152, 535010), (190, 428008), (266, 305720), (280, 290434), (304, 267505), (380, 214004), (532, 152860), (560, 145217), (665, 122288), (760, 107002), (1064, 76430), (1330, 61144), (1520, 53501), (2128, 38215), (2660, 30572), (5320, 15286), (7643, 10640)]