81321280

素因数分解:

$2^6\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5407}}^1$

素因数の和:5471

約数の個数: 56

約数和(自身を含む): 197803008

約数和(自身を除く): 116481728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 64, 80, 94, 160, 188, 235, 320, 376, 470, 752, 940, 1504, 1880, 3008, 3760, 5407, 7520, 10814, 15040, 21628, 27035, 43256, 54070, 86512, 108140, 173024, 216280, 254129, 346048, 432560, 508258, 865120, 1016516, 1270645, 1730240, 2033032, 2541290, 4066064, 5082580, 8132128, 10165160, 16264256, 20330320, 40660640, 81321280]

約数ペア:

[(1, 81321280), (2, 40660640), (4, 20330320), (5, 16264256), (8, 10165160), (10, 8132128), (16, 5082580), (20, 4066064), (32, 2541290), (40, 2033032), (47, 1730240), (64, 1270645), (80, 1016516), (94, 865120), (160, 508258), (188, 432560), (235, 346048), (320, 254129), (376, 216280), (470, 173024), (752, 108140), (940, 86512), (1504, 54070), (1880, 43256), (3008, 27035), (3760, 21628), (5407, 15040), (7520, 10814)]