20717920

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4177}}^1$

素因数の和:4223

約数の個数: 48

約数和(自身を含む): 50537088

約数和(自身を除く): 29819168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4177, 4960, 8354, 16708, 20885, 33416, 41770, 66832, 83540, 129487, 133664, 167080, 258974, 334160, 517948, 647435, 668320, 1035896, 1294870, 2071792, 2589740, 4143584, 5179480, 10358960, 20717920]

約数ペア:

[(1, 20717920), (2, 10358960), (4, 5179480), (5, 4143584), (8, 2589740), (10, 2071792), (16, 1294870), (20, 1035896), (31, 668320), (32, 647435), (40, 517948), (62, 334160), (80, 258974), (124, 167080), (155, 133664), (160, 129487), (248, 83540), (310, 66832), (496, 41770), (620, 33416), (992, 20885), (1240, 16708), (2480, 8354), (4177, 4960)]