21008979

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{293}}^1$

素因数の和:587

約数の個数: 24

約数和(自身を含む): 31554432

約数和(自身を除く): 10545453

約数列:

[1, 3, 9, 31, 93, 257, 279, 293, 771, 879, 2313, 2637, 7967, 9083, 23901, 27249, 71703, 75301, 81747, 225903, 677709, 2334331, 7002993, 21008979]

約数ペア:

[(1, 21008979), (3, 7002993), (9, 2334331), (31, 677709), (93, 225903), (257, 81747), (279, 75301), (293, 71703), (771, 27249), (879, 23901), (2313, 9083), (2637, 7967)]