21145047

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{383}}^1$

素因数の和:643

約数の個数: 32

約数和(自身を含む): 35389440

約数和(自身を除く): 14244393

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 239, 383, 717, 1149, 1673, 2629, 2681, 4213, 5019, 7887, 8043, 12639, 18403, 29491, 55209, 88473, 91537, 274611, 640759, 1006907, 1922277, 3020721, 7048349, 21145047]

約数ペア:

[(1, 21145047), (3, 7048349), (7, 3020721), (11, 1922277), (21, 1006907), (33, 640759), (77, 274611), (231, 91537), (239, 88473), (383, 55209), (717, 29491), (1149, 18403), (1673, 12639), (2629, 8043), (2681, 7887), (4213, 5019)]