21386435

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{857}}^1$

素因数の和:923

約数の個数: 32

約数和(自身を含む): 31629312

約数和(自身を除く): 10242877

約数列:

[1, 5, 7, 23, 31, 35, 115, 155, 161, 217, 713, 805, 857, 1085, 3565, 4285, 4991, 5999, 19711, 24955, 26567, 29995, 98555, 132835, 137977, 185969, 611041, 689885, 929845, 3055205, 4277287, 21386435]

約数ペア:

[(1, 21386435), (5, 4277287), (7, 3055205), (23, 929845), (31, 689885), (35, 611041), (115, 185969), (155, 137977), (161, 132835), (217, 98555), (713, 29995), (805, 26567), (857, 24955), (1085, 19711), (3565, 5999), (4285, 4991)]