21531921

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{503}}^1\times {\mathrm{751}}^1$

素因数の和:1276

約数の個数: 16

約数和(自身を含む): 30320640

約数和(自身を除く): 8788719

約数列:

[1, 3, 19, 57, 503, 751, 1509, 2253, 9557, 14269, 28671, 42807, 377753, 1133259, 7177307, 21531921]

約数ペア:

[(1, 21531921), (3, 7177307), (19, 1133259), (57, 377753), (503, 42807), (751, 28671), (1509, 14269), (2253, 9557)]