19937541

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 29836800

約数和(自身を除く): 9899259

約数列:

[1, 3, 13, 39, 47, 73, 141, 149, 219, 447, 611, 949, 1833, 1937, 2847, 3431, 5811, 7003, 10293, 10877, 21009, 32631, 44603, 91039, 133809, 141401, 273117, 424203, 511219, 1533657, 6645847, 19937541]

約数ペア:

[(1, 19937541), (3, 6645847), (13, 1533657), (39, 511219), (47, 424203), (73, 273117), (141, 141401), (149, 133809), (219, 91039), (447, 44603), (611, 32631), (949, 21009), (1833, 10877), (1937, 10293), (2847, 7003), (3431, 5811)]