19982240

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1759}}^1$

素因数の和:1845

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 27917920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1759, 2272, 2840, 3518, 5680, 7036, 8795, 11360, 14072, 17590, 28144, 35180, 56288, 70360, 124889, 140720, 249778, 281440, 499556, 624445, 999112, 1248890, 1998224, 2497780, 3996448, 4995560, 9991120, 19982240]

約数ペア:

[(1, 19982240), (2, 9991120), (4, 4995560), (5, 3996448), (8, 2497780), (10, 1998224), (16, 1248890), (20, 999112), (32, 624445), (40, 499556), (71, 281440), (80, 249778), (142, 140720), (160, 124889), (284, 70360), (355, 56288), (568, 35180), (710, 28144), (1136, 17590), (1420, 14072), (1759, 11360), (2272, 8795), (2840, 7036), (3518, 5680)]