81338240

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6689}}^1$

素因数の和:6727

約数の個数: 64

約数和(自身を含む): 204714000

約数和(自身を除く): 123375760

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 304, 320, 380, 608, 640, 760, 1216, 1520, 2432, 3040, 6080, 6689, 12160, 13378, 26756, 33445, 53512, 66890, 107024, 127091, 133780, 214048, 254182, 267560, 428096, 508364, 535120, 635455, 856192, 1016728, 1070240, 1270910, 2033456, 2140480, 2541820, 4066912, 4280960, 5083640, 8133824, 10167280, 16267648, 20334560, 40669120, 81338240]

約数ペア:

[(1, 81338240), (2, 40669120), (4, 20334560), (5, 16267648), (8, 10167280), (10, 8133824), (16, 5083640), (19, 4280960), (20, 4066912), (32, 2541820), (38, 2140480), (40, 2033456), (64, 1270910), (76, 1070240), (80, 1016728), (95, 856192), (128, 635455), (152, 535120), (160, 508364), (190, 428096), (304, 267560), (320, 254182), (380, 214048), (608, 133780), (640, 127091), (760, 107024), (1216, 66890), (1520, 53512), (2432, 33445), (3040, 26756), (6080, 13378), (6689, 12160)]