81685940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:190

約数の個数: 144

約数和(自身を含む): 217183680

約数和(自身を除く): 135497740

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 41, 49, 70, 76, 82, 95, 98, 107, 133, 140, 164, 190, 196, 205, 214, 245, 266, 287, 380, 410, 428, 490, 532, 535, 574, 665, 749, 779, 820, 931, 980, 1070, 1148, 1330, 1435, 1498, 1558, 1862, 2009, 2033, 2140, 2660, 2870, 2996, 3116, 3724, 3745, 3895, 4018, 4066, 4387, 4655, 5243, 5453, 5740, 7490, 7790, 8036, 8132, 8774, 9310, 10045, 10165, 10486, 10906, 14231, 14980, 15580, 17548, 18620, 20090, 20330, 20972, 21812, 21935, 26215, 27265, 28462, 30709, 38171, 40180, 40660, 43870, 52430, 54530, 56924, 61418, 71155, 76342, 83353, 87740, 99617, 104860, 109060, 122836, 142310, 152684, 153545, 166706, 190855, 199234, 214963, 284620, 307090, 333412, 381710, 398468, 416765, 429926, 498085, 583471, 614180, 763420, 833530, 859852, 996170, 1074815, 1166942, 1667060, 1992340, 2149630, 2333884, 2917355, 4084297, 4299260, 5834710, 8168594, 11669420, 16337188, 20421485, 40842970, 81685940]

約数ペア:

[(1, 81685940), (2, 40842970), (4, 20421485), (5, 16337188), (7, 11669420), (10, 8168594), (14, 5834710), (19, 4299260), (20, 4084297), (28, 2917355), (35, 2333884), (38, 2149630), (41, 1992340), (49, 1667060), (70, 1166942), (76, 1074815), (82, 996170), (95, 859852), (98, 833530), (107, 763420), (133, 614180), (140, 583471), (164, 498085), (190, 429926), (196, 416765), (205, 398468), (214, 381710), (245, 333412), (266, 307090), (287, 284620), (380, 214963), (410, 199234), (428, 190855), (490, 166706), (532, 153545), (535, 152684), (574, 142310), (665, 122836), (749, 109060), (779, 104860), (820, 99617), (931, 87740), (980, 83353), (1070, 76342), (1148, 71155), (1330, 61418), (1435, 56924), (1498, 54530), (1558, 52430), (1862, 43870), (2009, 40660), (2033, 40180), (2140, 38171), (2660, 30709), (2870, 28462), (2996, 27265), (3116, 26215), (3724, 21935), (3745, 21812), (3895, 20972), (4018, 20330), (4066, 20090), (4387, 18620), (4655, 17548), (5243, 15580), (5453, 14980), (5740, 14231), (7490, 10906), (7790, 10486), (8036, 10165), (8132, 10045), (8774, 9310)]