21218505

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{18371}}^1$

素因数の和:18397

約数の個数: 32

約数和(自身を含む): 42329088

約数和(自身を除く): 21110583

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155, 18371, 55113, 91855, 128597, 202081, 275565, 385791, 606243, 642985, 1010405, 1414567, 1928955, 3031215, 4243701, 7072835, 21218505]

約数ペア:

[(1, 21218505), (3, 7072835), (5, 4243701), (7, 3031215), (11, 1928955), (15, 1414567), (21, 1010405), (33, 642985), (35, 606243), (55, 385791), (77, 275565), (105, 202081), (165, 128597), (231, 91855), (385, 55113), (1155, 18371)]