21066615

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5381}}^1$

素因数の和:5424

約数の個数: 32

約数和(自身を含む): 38750400

約数和(自身を除く): 17683785

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5381, 16143, 26905, 48429, 80715, 145287, 156049, 242145, 468147, 726435, 780245, 1404441, 2340735, 4213323, 7022205, 21066615]

約数ペア:

[(1, 21066615), (3, 7022205), (5, 4213323), (9, 2340735), (15, 1404441), (27, 780245), (29, 726435), (45, 468147), (87, 242145), (135, 156049), (145, 145287), (261, 80715), (435, 48429), (783, 26905), (1305, 16143), (3915, 5381)]