81757280

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:181

約数の個数: 144

約数和(自身を含む): 219596832

約数和(自身を除く): 137839552

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 41, 44, 55, 80, 82, 88, 103, 110, 121, 160, 164, 176, 205, 206, 220, 242, 328, 352, 410, 412, 440, 451, 484, 515, 605, 656, 820, 824, 880, 902, 968, 1030, 1133, 1210, 1312, 1640, 1648, 1760, 1804, 1936, 2060, 2255, 2266, 2420, 3280, 3296, 3608, 3872, 4120, 4223, 4510, 4532, 4840, 4961, 5665, 6560, 7216, 8240, 8446, 9020, 9064, 9680, 9922, 11330, 12463, 14432, 16480, 16892, 18040, 18128, 19360, 19844, 21115, 22660, 24805, 24926, 33784, 36080, 36256, 39688, 42230, 45320, 46453, 49610, 49852, 62315, 67568, 72160, 79376, 84460, 90640, 92906, 99220, 99704, 124630, 135136, 158752, 168920, 181280, 185812, 198440, 199408, 232265, 249260, 337840, 371624, 396880, 398816, 464530, 498520, 510983, 675680, 743248, 793760, 929060, 997040, 1021966, 1486496, 1858120, 1994080, 2043932, 2554915, 3716240, 4087864, 5109830, 7432480, 8175728, 10219660, 16351456, 20439320, 40878640, 81757280]

約数ペア:

[(1, 81757280), (2, 40878640), (4, 20439320), (5, 16351456), (8, 10219660), (10, 8175728), (11, 7432480), (16, 5109830), (20, 4087864), (22, 3716240), (32, 2554915), (40, 2043932), (41, 1994080), (44, 1858120), (55, 1486496), (80, 1021966), (82, 997040), (88, 929060), (103, 793760), (110, 743248), (121, 675680), (160, 510983), (164, 498520), (176, 464530), (205, 398816), (206, 396880), (220, 371624), (242, 337840), (328, 249260), (352, 232265), (410, 199408), (412, 198440), (440, 185812), (451, 181280), (484, 168920), (515, 158752), (605, 135136), (656, 124630), (820, 99704), (824, 99220), (880, 92906), (902, 90640), (968, 84460), (1030, 79376), (1133, 72160), (1210, 67568), (1312, 62315), (1640, 49852), (1648, 49610), (1760, 46453), (1804, 45320), (1936, 42230), (2060, 39688), (2255, 36256), (2266, 36080), (2420, 33784), (3280, 24926), (3296, 24805), (3608, 22660), (3872, 21115), (4120, 19844), (4223, 19360), (4510, 18128), (4532, 18040), (4840, 16892), (4961, 16480), (5665, 14432), (6560, 12463), (7216, 11330), (8240, 9922), (8446, 9680), (9020, 9064)]