20990904

素因数分解:

$2^3\times 3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{3457}}^1$

素因数の和:3500

約数の個数: 64

約数和(自身を含む): 59754240

約数和(自身を除く): 38763336

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 22, 23, 24, 33, 44, 46, 66, 69, 88, 92, 132, 138, 184, 253, 264, 276, 506, 552, 759, 1012, 1518, 2024, 3036, 3457, 6072, 6914, 10371, 13828, 20742, 27656, 38027, 41484, 76054, 79511, 82968, 114081, 152108, 159022, 228162, 238533, 304216, 318044, 456324, 477066, 636088, 874621, 912648, 954132, 1749242, 1908264, 2623863, 3498484, 5247726, 6996968, 10495452, 20990904]

約数ペア:

[(1, 20990904), (2, 10495452), (3, 6996968), (4, 5247726), (6, 3498484), (8, 2623863), (11, 1908264), (12, 1749242), (22, 954132), (23, 912648), (24, 874621), (33, 636088), (44, 477066), (46, 456324), (66, 318044), (69, 304216), (88, 238533), (92, 228162), (132, 159022), (138, 152108), (184, 114081), (253, 82968), (264, 79511), (276, 76054), (506, 41484), (552, 38027), (759, 27656), (1012, 20742), (1518, 13828), (2024, 10371), (3036, 6914), (3457, 6072)]