205759820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{209959}}^1$

素因数の和:209982

約数の個数: 36

約数和(自身を含む): 502644240

約数和(自身を除く): 296884420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 209959, 419918, 839836, 1049795, 1469713, 2099590, 2939426, 4199180, 5878852, 7348565, 10287991, 14697130, 20575982, 29394260, 41151964, 51439955, 102879910, 205759820]

約数ペア:

[(1, 205759820), (2, 102879910), (4, 51439955), (5, 41151964), (7, 29394260), (10, 20575982), (14, 14697130), (20, 10287991), (28, 7348565), (35, 5878852), (49, 4199180), (70, 2939426), (98, 2099590), (140, 1469713), (196, 1049795), (245, 839836), (490, 419918), (980, 209959)]