640236961

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1\times {\mathrm{1399}}^1$

素因数の和:1573

約数の個数: 32

約数和(自身を含む): 812851200

約数和(自身を除く): 172614239

約数列:

[1, 7, 13, 47, 91, 107, 329, 611, 749, 1391, 1399, 4277, 5029, 9737, 9793, 18187, 35203, 65377, 65753, 127309, 149693, 457639, 460271, 854789, 1047851, 1946009, 5983523, 7035571, 13622063, 49248997, 91462423, 640236961]

約数ペア:

[(1, 640236961), (7, 91462423), (13, 49248997), (47, 13622063), (91, 7035571), (107, 5983523), (329, 1946009), (611, 1047851), (749, 854789), (1391, 460271), (1399, 457639), (4277, 149693), (5029, 127309), (9737, 65753), (9793, 65377), (18187, 35203)]