81442880

素因数分解:

$2^6\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1831}}^1$

素因数の和:1987

約数の個数: 56

約数和(自身を含む): 195437760

約数和(自身を除く): 113994880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 139, 160, 278, 320, 556, 695, 1112, 1390, 1831, 2224, 2780, 3662, 4448, 5560, 7324, 8896, 9155, 11120, 14648, 18310, 22240, 29296, 36620, 44480, 58592, 73240, 117184, 146480, 254509, 292960, 509018, 585920, 1018036, 1272545, 2036072, 2545090, 4072144, 5090180, 8144288, 10180360, 16288576, 20360720, 40721440, 81442880]

約数ペア:

[(1, 81442880), (2, 40721440), (4, 20360720), (5, 16288576), (8, 10180360), (10, 8144288), (16, 5090180), (20, 4072144), (32, 2545090), (40, 2036072), (64, 1272545), (80, 1018036), (139, 585920), (160, 509018), (278, 292960), (320, 254509), (556, 146480), (695, 117184), (1112, 73240), (1390, 58592), (1831, 44480), (2224, 36620), (2780, 29296), (3662, 22240), (4448, 18310), (5560, 14648), (7324, 11120), (8896, 9155)]