21630640

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2129}}^1$

素因数の和:2269

約数の個数: 40

約数和(自身を含む): 50711040

約数和(自身を除く): 29080400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2129, 2540, 4258, 5080, 8516, 10160, 10645, 17032, 21290, 34064, 42580, 85160, 170320, 270383, 540766, 1081532, 1351915, 2163064, 2703830, 4326128, 5407660, 10815320, 21630640]

約数ペア:

[(1, 21630640), (2, 10815320), (4, 5407660), (5, 4326128), (8, 2703830), (10, 2163064), (16, 1351915), (20, 1081532), (40, 540766), (80, 270383), (127, 170320), (254, 85160), (508, 42580), (635, 34064), (1016, 21290), (1270, 17032), (2032, 10645), (2129, 10160), (2540, 8516), (4258, 5080)]