21196815

素因数分解:

$3^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{4603}}^1$

素因数の和:4918

約数の個数: 16

約数和(自身を含む): 34032768

約数和(自身を除く): 12835953

約数列:

[1, 3, 5, 15, 307, 921, 1535, 4603, 4605, 13809, 23015, 69045, 1413121, 4239363, 7065605, 21196815]

約数ペア:

[(1, 21196815), (3, 7065605), (5, 4239363), (15, 1413121), (307, 69045), (921, 23015), (1535, 13809), (4603, 4605)]