21004557

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{863}}^1$

素因数の和:953

約数の個数: 32

約数和(自身を含む): 34283520

約数和(自身を除く): 13278963

約数列:

[1, 3, 7, 19, 21, 57, 61, 133, 183, 399, 427, 863, 1159, 1281, 2589, 3477, 6041, 8113, 16397, 18123, 24339, 49191, 52643, 114779, 157929, 344337, 368501, 1000217, 1105503, 3000651, 7001519, 21004557]

約数ペア:

[(1, 21004557), (3, 7001519), (7, 3000651), (19, 1105503), (21, 1000217), (57, 368501), (61, 344337), (133, 157929), (183, 114779), (399, 52643), (427, 49191), (863, 24339), (1159, 18123), (1281, 16397), (2589, 8113), (3477, 6041)]