19971978

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{2393}}^1$

素因数の和:2518

約数の個数: 32

約数和(自身を含む): 43436736

約数和(自身を除く): 23464758

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 107, 214, 321, 642, 1391, 2393, 2782, 4173, 4786, 7179, 8346, 14358, 31109, 62218, 93327, 186654, 256051, 512102, 768153, 1536306, 3328663, 6657326, 9985989, 19971978]

約数ペア:

[(1, 19971978), (2, 9985989), (3, 6657326), (6, 3328663), (13, 1536306), (26, 768153), (39, 512102), (78, 256051), (107, 186654), (214, 93327), (321, 62218), (642, 31109), (1391, 14358), (2393, 8346), (2782, 7179), (4173, 4786)]