21545895

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1307}}^1$

素因数の和:1479

約数の個数: 32

約数和(自身を含む): 39679488

約数和(自身を除く): 18133593

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 157, 471, 785, 1099, 1307, 2355, 3297, 3921, 5495, 6535, 9149, 16485, 19605, 27447, 45745, 137235, 205199, 615597, 1025995, 1436393, 3077985, 4309179, 7181965, 21545895]

約数ペア:

[(1, 21545895), (3, 7181965), (5, 4309179), (7, 3077985), (15, 1436393), (21, 1025995), (35, 615597), (105, 205199), (157, 137235), (471, 45745), (785, 27447), (1099, 19605), (1307, 16485), (2355, 9149), (3297, 6535), (3921, 5495)]