21189213

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{439}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 31848960

約数和(自身を除く): 10659747

約数列:

[1, 3, 9, 31, 93, 173, 279, 439, 519, 1317, 1557, 3951, 5363, 13609, 16089, 40827, 48267, 75947, 122481, 227841, 683523, 2354357, 7063071, 21189213]

約数ペア:

[(1, 21189213), (3, 7063071), (9, 2354357), (31, 683523), (93, 227841), (173, 122481), (279, 75947), (439, 48267), (519, 40827), (1317, 16089), (1557, 13609), (3951, 5363)]