21291135

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{23269}}^1$

素因数の和:23338

約数の個数: 16

約数和(自身を含む): 34625760

約数和(自身を除く): 13334625

約数列:

[1, 3, 5, 15, 61, 183, 305, 915, 23269, 69807, 116345, 349035, 1419409, 4258227, 7097045, 21291135]

約数ペア:

[(1, 21291135), (3, 7097045), (5, 4258227), (15, 1419409), (61, 349035), (183, 116345), (305, 69807), (915, 23269)]