81727760

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24917}}^1$

素因数の和:24971

約数の個数: 40

約数和(自身を含む): 194659416

約数和(自身を除く): 112931656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 24917, 49834, 99668, 124585, 199336, 249170, 398672, 498340, 996680, 1021597, 1993360, 2043194, 4086388, 5107985, 8172776, 10215970, 16345552, 20431940, 40863880, 81727760]

約数ペア:

[(1, 81727760), (2, 40863880), (4, 20431940), (5, 16345552), (8, 10215970), (10, 8172776), (16, 5107985), (20, 4086388), (40, 2043194), (41, 1993360), (80, 1021597), (82, 996680), (164, 498340), (205, 398672), (328, 249170), (410, 199336), (656, 124585), (820, 99668), (1640, 49834), (3280, 24917)]