81257680

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1091}}^1$

素因数の和:1137

約数の個数: 120

約数和(自身を含む): 231547680

約数和(自身を除く): 150290000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 49, 56, 70, 76, 80, 95, 98, 112, 133, 140, 152, 190, 196, 245, 266, 280, 304, 380, 392, 490, 532, 560, 665, 760, 784, 931, 980, 1064, 1091, 1330, 1520, 1862, 1960, 2128, 2182, 2660, 3724, 3920, 4364, 4655, 5320, 5455, 7448, 7637, 8728, 9310, 10640, 10910, 14896, 15274, 17456, 18620, 20729, 21820, 30548, 37240, 38185, 41458, 43640, 53459, 61096, 74480, 76370, 82916, 87280, 103645, 106918, 122192, 145103, 152740, 165832, 207290, 213836, 267295, 290206, 305480, 331664, 414580, 427672, 534590, 580412, 610960, 725515, 829160, 855344, 1015721, 1069180, 1160824, 1451030, 1658320, 2031442, 2138360, 2321648, 2902060, 4062884, 4276720, 5078605, 5804120, 8125768, 10157210, 11608240, 16251536, 20314420, 40628840, 81257680]

約数ペア:

[(1, 81257680), (2, 40628840), (4, 20314420), (5, 16251536), (7, 11608240), (8, 10157210), (10, 8125768), (14, 5804120), (16, 5078605), (19, 4276720), (20, 4062884), (28, 2902060), (35, 2321648), (38, 2138360), (40, 2031442), (49, 1658320), (56, 1451030), (70, 1160824), (76, 1069180), (80, 1015721), (95, 855344), (98, 829160), (112, 725515), (133, 610960), (140, 580412), (152, 534590), (190, 427672), (196, 414580), (245, 331664), (266, 305480), (280, 290206), (304, 267295), (380, 213836), (392, 207290), (490, 165832), (532, 152740), (560, 145103), (665, 122192), (760, 106918), (784, 103645), (931, 87280), (980, 82916), (1064, 76370), (1091, 74480), (1330, 61096), (1520, 53459), (1862, 43640), (1960, 41458), (2128, 38185), (2182, 37240), (2660, 30548), (3724, 21820), (3920, 20729), (4364, 18620), (4655, 17456), (5320, 15274), (5455, 14896), (7448, 10910), (7637, 10640), (8728, 9310)]