19977685

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{83}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 31215744

約数和(自身を除く): 11238059

約数列:

[1, 5, 7, 13, 23, 35, 65, 83, 91, 115, 161, 299, 415, 455, 529, 581, 805, 1079, 1495, 1909, 2093, 2645, 2905, 3703, 5395, 6877, 7553, 9545, 10465, 13363, 18515, 24817, 34385, 37765, 43907, 48139, 66815, 124085, 173719, 219535, 240695, 307349, 570791, 868595, 1536745, 2853955, 3995537, 19977685]

約数ペア:

[(1, 19977685), (5, 3995537), (7, 2853955), (13, 1536745), (23, 868595), (35, 570791), (65, 307349), (83, 240695), (91, 219535), (115, 173719), (161, 124085), (299, 66815), (415, 48139), (455, 43907), (529, 37765), (581, 34385), (805, 24817), (1079, 18515), (1495, 13363), (1909, 10465), (2093, 9545), (2645, 7553), (2905, 6877), (3703, 5395)]