21555177

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{607}}^1$

素因数の和:725

約数の個数: 32

約数和(自身を含む): 35020800

約数和(自身を除く): 13465623

約数列:

[1, 3, 7, 19, 21, 57, 89, 133, 267, 399, 607, 623, 1691, 1821, 1869, 4249, 5073, 11533, 11837, 12747, 34599, 35511, 54023, 80731, 162069, 242193, 378161, 1026437, 1134483, 3079311, 7185059, 21555177]

約数ペア:

[(1, 21555177), (3, 7185059), (7, 3079311), (19, 1134483), (21, 1026437), (57, 378161), (89, 242193), (133, 162069), (267, 80731), (399, 54023), (607, 35511), (623, 34599), (1691, 12747), (1821, 11837), (1869, 11533), (4249, 5073)]