21192880

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15583}}^1$

素因数の和:15613

約数の個数: 40

約数和(自身を含む): 52175232

約数和(自身を除く): 30982352

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15583, 31166, 62332, 77915, 124664, 155830, 249328, 264911, 311660, 529822, 623320, 1059644, 1246640, 1324555, 2119288, 2649110, 4238576, 5298220, 10596440, 21192880]

約数ペア:

[(1, 21192880), (2, 10596440), (4, 5298220), (5, 4238576), (8, 2649110), (10, 2119288), (16, 1324555), (17, 1246640), (20, 1059644), (34, 623320), (40, 529822), (68, 311660), (80, 264911), (85, 249328), (136, 155830), (170, 124664), (272, 77915), (340, 62332), (680, 31166), (1360, 15583)]