21023847

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{673}}^1$

素因数の和:784

約数の個数: 32

約数和(自身を含む): 33969600

約数和(自身を除く): 12945753

約数列:

[1, 3, 9, 13, 27, 39, 89, 117, 267, 351, 673, 801, 1157, 2019, 2403, 3471, 6057, 8749, 10413, 18171, 26247, 31239, 59897, 78741, 179691, 236223, 539073, 778661, 1617219, 2335983, 7007949, 21023847]

約数ペア:

[(1, 21023847), (3, 7007949), (9, 2335983), (13, 1617219), (27, 778661), (39, 539073), (89, 236223), (117, 179691), (267, 78741), (351, 59897), (673, 31239), (801, 26247), (1157, 18171), (2019, 10413), (2403, 8749), (3471, 6057)]