81175820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{1873}}^1$

素因数の和:2090

約数の個数: 48

約数和(自身を含む): 187010208

約数和(自身を除く): 105834388

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 197, 220, 394, 788, 985, 1873, 1970, 2167, 3746, 3940, 4334, 7492, 8668, 9365, 10835, 18730, 20603, 21670, 37460, 41206, 43340, 82412, 103015, 206030, 368981, 412060, 737962, 1475924, 1844905, 3689810, 4058791, 7379620, 8117582, 16235164, 20293955, 40587910, 81175820]

約数ペア:

[(1, 81175820), (2, 40587910), (4, 20293955), (5, 16235164), (10, 8117582), (11, 7379620), (20, 4058791), (22, 3689810), (44, 1844905), (55, 1475924), (110, 737962), (197, 412060), (220, 368981), (394, 206030), (788, 103015), (985, 82412), (1873, 43340), (1970, 41206), (2167, 37460), (3746, 21670), (3940, 20603), (4334, 18730), (7492, 10835), (8668, 9365)]