19780180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{8311}}^1$

素因数の和:8344

約数の個数: 48

約数和(自身を含む): 50270976

約数和(自身を除く): 30490796

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 476, 595, 1190, 2380, 8311, 16622, 33244, 41555, 58177, 83110, 116354, 141287, 166220, 232708, 282574, 290885, 565148, 581770, 706435, 989009, 1163540, 1412870, 1978018, 2825740, 3956036, 4945045, 9890090, 19780180]

約数ペア:

[(1, 19780180), (2, 9890090), (4, 4945045), (5, 3956036), (7, 2825740), (10, 1978018), (14, 1412870), (17, 1163540), (20, 989009), (28, 706435), (34, 581770), (35, 565148), (68, 290885), (70, 282574), (85, 232708), (119, 166220), (140, 141287), (170, 116354), (238, 83110), (340, 58177), (476, 41555), (595, 33244), (1190, 16622), (2380, 8311)]