217778906

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{647}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 347120640

約数和(自身を除く): 129341734

約数列:

[1, 2, 31, 61, 62, 89, 122, 178, 647, 1294, 1891, 2759, 3782, 5429, 5518, 10858, 20057, 39467, 40114, 57583, 78934, 115166, 168299, 336598, 1223477, 1785073, 2446954, 3512563, 3570146, 7025126, 108889453, 217778906]

約数ペア:

[(1, 217778906), (2, 108889453), (31, 7025126), (61, 3570146), (62, 3512563), (89, 2446954), (122, 1785073), (178, 1223477), (647, 336598), (1294, 168299), (1891, 115166), (2759, 78934), (3782, 57583), (5429, 40114), (5518, 39467), (10858, 20057)]