81683980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{4903}}^1$

素因数の和:4943

約数の個数: 72

約数和(自身を含む): 211323168

約数和(自身を除く): 129639188

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 196, 238, 245, 340, 476, 490, 595, 833, 980, 1190, 1666, 2380, 3332, 4165, 4903, 8330, 9806, 16660, 19612, 24515, 34321, 49030, 68642, 83351, 98060, 137284, 166702, 171605, 240247, 333404, 343210, 416755, 480494, 583457, 686420, 833510, 960988, 1166914, 1201235, 1667020, 2333828, 2402470, 2917285, 4084199, 4804940, 5834570, 8168398, 11669140, 16336796, 20420995, 40841990, 81683980]

約数ペア:

[(1, 81683980), (2, 40841990), (4, 20420995), (5, 16336796), (7, 11669140), (10, 8168398), (14, 5834570), (17, 4804940), (20, 4084199), (28, 2917285), (34, 2402470), (35, 2333828), (49, 1667020), (68, 1201235), (70, 1166914), (85, 960988), (98, 833510), (119, 686420), (140, 583457), (170, 480494), (196, 416755), (238, 343210), (245, 333404), (340, 240247), (476, 171605), (490, 166702), (595, 137284), (833, 98060), (980, 83351), (1190, 68642), (1666, 49030), (2380, 34321), (3332, 24515), (4165, 19612), (4903, 16660), (8330, 9806)]