78874240

素因数分解:

$2^7\times 5^1\times {\mathrm{251}}^1\times {\mathrm{491}}^1$

素因数の和:761

約数の個数: 64

約数和(自身を含む): 189695520

約数和(自身を除く): 110821280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 251, 320, 491, 502, 640, 982, 1004, 1255, 1964, 2008, 2455, 2510, 3928, 4016, 4910, 5020, 7856, 8032, 9820, 10040, 15712, 16064, 19640, 20080, 31424, 32128, 39280, 40160, 62848, 78560, 80320, 123241, 157120, 160640, 246482, 314240, 492964, 616205, 985928, 1232410, 1971856, 2464820, 3943712, 4929640, 7887424, 9859280, 15774848, 19718560, 39437120, 78874240]

約数ペア:

[(1, 78874240), (2, 39437120), (4, 19718560), (5, 15774848), (8, 9859280), (10, 7887424), (16, 4929640), (20, 3943712), (32, 2464820), (40, 1971856), (64, 1232410), (80, 985928), (128, 616205), (160, 492964), (251, 314240), (320, 246482), (491, 160640), (502, 157120), (640, 123241), (982, 80320), (1004, 78560), (1255, 62848), (1964, 40160), (2008, 39280), (2455, 32128), (2510, 31424), (3928, 20080), (4016, 19640), (4910, 16064), (5020, 15712), (7856, 10040), (8032, 9820)]