21091295

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1\times {\mathrm{659}}^1$

素因数の和:874

約数の個数: 16

約数和(自身を含む): 26183520

約数和(自身を除く): 5092225

約数列:

[1, 5, 37, 173, 185, 659, 865, 3295, 6401, 24383, 32005, 114007, 121915, 570035, 4218259, 21091295]

約数ペア:

[(1, 21091295), (5, 4218259), (37, 570035), (173, 121915), (185, 114007), (659, 32005), (865, 24383), (3295, 6401)]