81739960

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{21067}}^1$

素因数の和:21175

約数の個数: 32

約数和(自身を含む): 185819760

約数和(自身を除く): 104079800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 21067, 42134, 84268, 105335, 168536, 210670, 421340, 842680, 2043499, 4086998, 8173996, 10217495, 16347992, 20434990, 40869980, 81739960]

約数ペア:

[(1, 81739960), (2, 40869980), (4, 20434990), (5, 16347992), (8, 10217495), (10, 8173996), (20, 4086998), (40, 2043499), (97, 842680), (194, 421340), (388, 210670), (485, 168536), (776, 105335), (970, 84268), (1940, 42134), (3880, 21067)]