401020280

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{78941}}^1$

素因数の和:79079

約数の個数: 32

約数和(自身を含む): 909411840

約数和(自身を除く): 508391560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 5080, 78941, 157882, 315764, 394705, 631528, 789410, 1578820, 3157640, 10025507, 20051014, 40102028, 50127535, 80204056, 100255070, 200510140, 401020280]

約数ペア:

[(1, 401020280), (2, 200510140), (4, 100255070), (5, 80204056), (8, 50127535), (10, 40102028), (20, 20051014), (40, 10025507), (127, 3157640), (254, 1578820), (508, 789410), (635, 631528), (1016, 394705), (1270, 315764), (2540, 157882), (5080, 78941)]