21690195

素因数分解:

$3^1\times 5^1\times {\mathrm{811}}^1\times {\mathrm{1783}}^1$

素因数の和:2602

約数の個数: 16

約数和(自身を含む): 34766592

約数和(自身を除く): 13076397

約数列:

[1, 3, 5, 15, 811, 1783, 2433, 4055, 5349, 8915, 12165, 26745, 1446013, 4338039, 7230065, 21690195]

約数ペア:

[(1, 21690195), (3, 7230065), (5, 4338039), (15, 1446013), (811, 26745), (1783, 12165), (2433, 8915), (4055, 5349)]