21053697

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 33288192

約数和(自身を除く): 12234495

約数列:

[1, 3, 7, 21, 47, 83, 141, 249, 257, 329, 581, 771, 987, 1743, 1799, 3901, 5397, 11703, 12079, 21331, 27307, 36237, 63993, 81921, 84553, 149317, 253659, 447951, 1002557, 3007671, 7017899, 21053697]

約数ペア:

[(1, 21053697), (3, 7017899), (7, 3007671), (21, 1002557), (47, 447951), (83, 253659), (141, 149317), (249, 84553), (257, 81921), (329, 63993), (581, 36237), (771, 27307), (987, 21331), (1743, 12079), (1799, 11703), (3901, 5397)]