21955409

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 5913775

約数列:

[1, 7, 23, 31, 53, 83, 161, 217, 371, 581, 713, 1219, 1643, 1909, 2573, 4399, 4991, 8533, 11501, 13363, 18011, 30793, 37789, 59179, 101177, 136369, 264523, 414253, 708239, 954583, 3136487, 21955409]

約数ペア:

[(1, 21955409), (7, 3136487), (23, 954583), (31, 708239), (53, 414253), (83, 264523), (161, 136369), (217, 101177), (371, 59179), (581, 37789), (713, 30793), (1219, 18011), (1643, 13363), (1909, 11501), (2573, 8533), (4399, 4991)]