21261867

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 32693760

約数和(自身を除く): 11431893

約数列:

[1, 3, 11, 23, 33, 69, 109, 253, 257, 327, 759, 771, 1199, 2507, 2827, 3597, 5911, 7521, 8481, 17733, 27577, 28013, 65021, 82731, 84039, 195063, 308143, 644299, 924429, 1932897, 7087289, 21261867]

約数ペア:

[(1, 21261867), (3, 7087289), (11, 1932897), (23, 924429), (33, 644299), (69, 308143), (109, 195063), (253, 84039), (257, 82731), (327, 65021), (759, 28013), (771, 27577), (1199, 17733), (2507, 8481), (2827, 7521), (3597, 5911)]