21221347

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{379}}^1\times {\mathrm{421}}^1$

素因数の和:826

約数の個数: 16

約数和(自身を含む): 25657600

約数和(自身を除く): 4436253

約数列:

[1, 7, 19, 133, 379, 421, 2653, 2947, 7201, 7999, 50407, 55993, 159559, 1116913, 3031621, 21221347]

約数ペア:

[(1, 21221347), (7, 3031621), (19, 1116913), (133, 159559), (379, 55993), (421, 50407), (2653, 7999), (2947, 7201)]