20720216

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{977}}^1$

素因数の和:1235

約数の個数: 32

約数和(自身を含む): 42601680

約数和(自身を除く): 21881464

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 241, 482, 964, 977, 1928, 1954, 2651, 3908, 5302, 7816, 10604, 10747, 21208, 21494, 42988, 85976, 235457, 470914, 941828, 1883656, 2590027, 5180054, 10360108, 20720216]

約数ペア:

[(1, 20720216), (2, 10360108), (4, 5180054), (8, 2590027), (11, 1883656), (22, 941828), (44, 470914), (88, 235457), (241, 85976), (482, 42988), (964, 21494), (977, 21208), (1928, 10747), (1954, 10604), (2651, 7816), (3908, 5302)]