19965820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{8389}}^1$

素因数の和:8422

約数の個数: 48

約数和(自身を含む): 50742720

約数和(自身を除く): 30776900

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, 8389, 16778, 33556, 41945, 58723, 83890, 117446, 142613, 167780, 234892, 285226, 293615, 570452, 587230, 713065, 998291, 1174460, 1426130, 1996582, 2852260, 3993164, 4991455, 9982910, 19965820]

約数ペア:

[(1, 19965820), (2, 9982910), (4, 4991455), (5, 3993164), (7, 2852260), (10, 1996582), (14, 1426130), (17, 1174460), (20, 998291), (28, 713065), (34, 587230), (35, 570452), (68, 293615), (70, 285226), (85, 234892), (119, 167780), (140, 142613), (170, 117446), (238, 83890), (340, 58723), (476, 41945), (595, 33556), (1190, 16778), (2380, 8389)]