21050421

素因数分解:

$3^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{2381}}^1$

素因数の和:2812

約数の個数: 16

約数和(自身を含む): 32166528

約数和(自身を除く): 11116107

約数列:

[1, 3, 7, 21, 421, 1263, 2381, 2947, 7143, 8841, 16667, 50001, 1002401, 3007203, 7016807, 21050421]

約数ペア:

[(1, 21050421), (3, 7016807), (7, 3007203), (21, 1002401), (421, 50001), (1263, 16667), (2381, 8841), (2947, 7143)]