1280389100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{313}}^1\times {\mathrm{2153}}^1$

素因数の和:2499

約数の個数: 72

約数和(自身を含む): 2935385040

約数和(自身を除く): 1654995940

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 313, 380, 475, 626, 950, 1252, 1565, 1900, 2153, 3130, 4306, 5947, 6260, 7825, 8612, 10765, 11894, 15650, 21530, 23788, 29735, 31300, 40907, 43060, 53825, 59470, 81814, 107650, 118940, 148675, 163628, 204535, 215300, 297350, 409070, 594700, 673889, 818140, 1022675, 1347778, 2045350, 2695556, 3369445, 4090700, 6738890, 12803891, 13477780, 16847225, 25607782, 33694450, 51215564, 64019455, 67388900, 128038910, 256077820, 320097275, 640194550, 1280389100]

約数ペア:

[(1, 1280389100), (2, 640194550), (4, 320097275), (5, 256077820), (10, 128038910), (19, 67388900), (20, 64019455), (25, 51215564), (38, 33694450), (50, 25607782), (76, 16847225), (95, 13477780), (100, 12803891), (190, 6738890), (313, 4090700), (380, 3369445), (475, 2695556), (626, 2045350), (950, 1347778), (1252, 1022675), (1565, 818140), (1900, 673889), (2153, 594700), (3130, 409070), (4306, 297350), (5947, 215300), (6260, 204535), (7825, 163628), (8612, 148675), (10765, 118940), (11894, 107650), (15650, 81814), (21530, 59470), (23788, 53825), (29735, 43060), (31300, 40907)]