81439160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{185089}}^1$

素因数の和:185111

約数の個数: 32

約数和(自身を含む): 199897200

約数和(自身を除く): 118458040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 185089, 370178, 740356, 925445, 1480712, 1850890, 2035979, 3701780, 4071958, 7403560, 8143916, 10179895, 16287832, 20359790, 40719580, 81439160]

約数ペア:

[(1, 81439160), (2, 40719580), (4, 20359790), (5, 16287832), (8, 10179895), (10, 8143916), (11, 7403560), (20, 4071958), (22, 3701780), (40, 2035979), (44, 1850890), (55, 1480712), (88, 925445), (110, 740356), (220, 370178), (440, 185089)]