20185991

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 24667776

約数和(自身を除く): 4481785

約数列:

[1, 7, 31, 49, 97, 137, 217, 679, 959, 1519, 3007, 4247, 4753, 6713, 13289, 21049, 29729, 93023, 147343, 208103, 411959, 651161, 2883713, 20185991]

約数ペア:

[(1, 20185991), (7, 2883713), (31, 651161), (49, 411959), (97, 208103), (137, 147343), (217, 93023), (679, 29729), (959, 21049), (1519, 13289), (3007, 6713), (4247, 4753)]