81641560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2039}}^1$

素因数の和:2081

約数の個数: 128

約数和(自身を含む): 246758400

約数和(自身を除く): 165116840

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 35, 40, 44, 52, 55, 56, 65, 70, 77, 88, 91, 104, 110, 130, 140, 143, 154, 182, 220, 260, 280, 286, 308, 364, 385, 440, 455, 520, 572, 616, 715, 728, 770, 910, 1001, 1144, 1430, 1540, 1820, 2002, 2039, 2860, 3080, 3640, 4004, 4078, 5005, 5720, 8008, 8156, 10010, 10195, 14273, 16312, 20020, 20390, 22429, 26507, 28546, 40040, 40780, 44858, 53014, 57092, 71365, 81560, 89716, 106028, 112145, 114184, 132535, 142730, 157003, 179432, 185549, 212056, 224290, 265070, 285460, 291577, 314006, 371098, 448580, 530140, 570920, 583154, 628012, 742196, 785015, 897160, 927745, 1060280, 1166308, 1256024, 1457885, 1484392, 1570030, 1855490, 2041039, 2332616, 2915770, 3140060, 3710980, 4082078, 5831540, 6280120, 7421960, 8164156, 10205195, 11663080, 16328312, 20410390, 40820780, 81641560]

約数ペア:

[(1, 81641560), (2, 40820780), (4, 20410390), (5, 16328312), (7, 11663080), (8, 10205195), (10, 8164156), (11, 7421960), (13, 6280120), (14, 5831540), (20, 4082078), (22, 3710980), (26, 3140060), (28, 2915770), (35, 2332616), (40, 2041039), (44, 1855490), (52, 1570030), (55, 1484392), (56, 1457885), (65, 1256024), (70, 1166308), (77, 1060280), (88, 927745), (91, 897160), (104, 785015), (110, 742196), (130, 628012), (140, 583154), (143, 570920), (154, 530140), (182, 448580), (220, 371098), (260, 314006), (280, 291577), (286, 285460), (308, 265070), (364, 224290), (385, 212056), (440, 185549), (455, 179432), (520, 157003), (572, 142730), (616, 132535), (715, 114184), (728, 112145), (770, 106028), (910, 89716), (1001, 81560), (1144, 71365), (1430, 57092), (1540, 53014), (1820, 44858), (2002, 40780), (2039, 40040), (2860, 28546), (3080, 26507), (3640, 22429), (4004, 20390), (4078, 20020), (5005, 16312), (5720, 14273), (8008, 10195), (8156, 10010)]