21325731

素因数分解:

$3^1\times 7^2\times {\mathrm{239}}^1\times {\mathrm{607}}^1$

素因数の和:863

約数の個数: 24

約数和(自身を含む): 33269760

約数和(自身を除く): 11944029

約数列:

[1, 3, 7, 21, 49, 147, 239, 607, 717, 1673, 1821, 4249, 5019, 11711, 12747, 29743, 35133, 89229, 145073, 435219, 1015511, 3046533, 7108577, 21325731]

約数ペア:

[(1, 21325731), (3, 7108577), (7, 3046533), (21, 1015511), (49, 435219), (147, 145073), (239, 89229), (607, 35133), (717, 29743), (1673, 12747), (1821, 11711), (4249, 5019)]