21757701

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{421}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 35002368

約数和(自身を除く): 13244667

約数列:

[1, 3, 7, 21, 23, 69, 107, 161, 321, 421, 483, 749, 1263, 2247, 2461, 2947, 7383, 8841, 9683, 17227, 29049, 45047, 51681, 67781, 135141, 203343, 315329, 945987, 1036081, 3108243, 7252567, 21757701]

約数ペア:

[(1, 21757701), (3, 7252567), (7, 3108243), (21, 1036081), (23, 945987), (69, 315329), (107, 203343), (161, 135141), (321, 67781), (421, 51681), (483, 45047), (749, 29049), (1263, 17227), (2247, 9683), (2461, 8841), (2947, 7383)]