21153885

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^2\times {\mathrm{379}}^1$

素因数の和:509

約数の個数: 24

約数和(自身を含む): 34500960

約数和(自身を除く): 13347075

約数列:

[1, 3, 5, 15, 61, 183, 305, 379, 915, 1137, 1895, 3721, 5685, 11163, 18605, 23119, 55815, 69357, 115595, 346785, 1410259, 4230777, 7051295, 21153885]

約数ペア:

[(1, 21153885), (3, 7051295), (5, 4230777), (15, 1410259), (61, 346785), (183, 115595), (305, 69357), (379, 55815), (915, 23119), (1137, 18605), (1895, 11163), (3721, 5685)]