80801680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:161

約数の個数: 160

約数和(自身を含む): 216950400

約数和(自身を除く): 136148720

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 53, 59, 68, 76, 80, 85, 95, 106, 118, 136, 152, 170, 190, 212, 236, 265, 272, 295, 304, 323, 340, 380, 424, 472, 530, 590, 646, 680, 760, 848, 901, 944, 1003, 1007, 1060, 1121, 1180, 1292, 1360, 1520, 1615, 1802, 2006, 2014, 2120, 2242, 2360, 2584, 3127, 3230, 3604, 4012, 4028, 4240, 4484, 4505, 4720, 5015, 5035, 5168, 5605, 6254, 6460, 7208, 8024, 8056, 8968, 9010, 10030, 10070, 11210, 12508, 12920, 14416, 15635, 16048, 16112, 17119, 17936, 18020, 19057, 20060, 20140, 22420, 25016, 25840, 31270, 34238, 36040, 38114, 40120, 40280, 44840, 50032, 53159, 59413, 62540, 68476, 72080, 76228, 80240, 80560, 85595, 89680, 95285, 106318, 118826, 125080, 136952, 152456, 171190, 190570, 212636, 237652, 250160, 265795, 273904, 297065, 304912, 342380, 381140, 425272, 475304, 531590, 594130, 684760, 762280, 850544, 950608, 1010021, 1063180, 1188260, 1369520, 1524560, 2020042, 2126360, 2376520, 4040084, 4252720, 4753040, 5050105, 8080168, 10100210, 16160336, 20200420, 40400840, 80801680]

約数ペア:

[(1, 80801680), (2, 40400840), (4, 20200420), (5, 16160336), (8, 10100210), (10, 8080168), (16, 5050105), (17, 4753040), (19, 4252720), (20, 4040084), (34, 2376520), (38, 2126360), (40, 2020042), (53, 1524560), (59, 1369520), (68, 1188260), (76, 1063180), (80, 1010021), (85, 950608), (95, 850544), (106, 762280), (118, 684760), (136, 594130), (152, 531590), (170, 475304), (190, 425272), (212, 381140), (236, 342380), (265, 304912), (272, 297065), (295, 273904), (304, 265795), (323, 250160), (340, 237652), (380, 212636), (424, 190570), (472, 171190), (530, 152456), (590, 136952), (646, 125080), (680, 118826), (760, 106318), (848, 95285), (901, 89680), (944, 85595), (1003, 80560), (1007, 80240), (1060, 76228), (1121, 72080), (1180, 68476), (1292, 62540), (1360, 59413), (1520, 53159), (1615, 50032), (1802, 44840), (2006, 40280), (2014, 40120), (2120, 38114), (2242, 36040), (2360, 34238), (2584, 31270), (3127, 25840), (3230, 25016), (3604, 22420), (4012, 20140), (4028, 20060), (4240, 19057), (4484, 18020), (4505, 17936), (4720, 17119), (5015, 16112), (5035, 16048), (5168, 15635), (5605, 14416), (6254, 12920), (6460, 12508), (7208, 11210), (8024, 10070), (8056, 10030), (8968, 9010)]