81280220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{82939}}^1$

素因数の和:82962

約数の個数: 36

約数和(自身を含む): 198558360

約数和(自身を除く): 117278140

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 82939, 165878, 331756, 414695, 580573, 829390, 1161146, 1658780, 2322292, 2902865, 4064011, 5805730, 8128022, 11611460, 16256044, 20320055, 40640110, 81280220]

約数ペア:

[(1, 81280220), (2, 40640110), (4, 20320055), (5, 16256044), (7, 11611460), (10, 8128022), (14, 5805730), (20, 4064011), (28, 2902865), (35, 2322292), (49, 1658780), (70, 1161146), (98, 829390), (140, 580573), (196, 414695), (245, 331756), (490, 165878), (980, 82939)]