21039935

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1091}}^1$

素因数の和:1151

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10409665

約数列:

[1, 5, 7, 19, 29, 35, 95, 133, 145, 203, 551, 665, 1015, 1091, 2755, 3857, 5455, 7637, 19285, 20729, 31639, 38185, 103645, 145103, 158195, 221473, 601141, 725515, 1107365, 3005705, 4207987, 21039935]

約数ペア:

[(1, 21039935), (5, 4207987), (7, 3005705), (19, 1107365), (29, 725515), (35, 601141), (95, 221473), (133, 158195), (145, 145103), (203, 103645), (551, 38185), (665, 31639), (1015, 20729), (1091, 19285), (2755, 7637), (3857, 5455)]