19971639

素因数分解:

$3^2\times {\mathrm{101}}^1\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:407

約数の個数: 24

約数和(自身を含む): 29532672

約数和(自身を除く): 9561033

約数列:

[1, 3, 9, 101, 127, 173, 303, 381, 519, 909, 1143, 1557, 12827, 17473, 21971, 38481, 52419, 65913, 115443, 157257, 197739, 2219071, 6657213, 19971639]

約数ペア:

[(1, 19971639), (3, 6657213), (9, 2219071), (101, 197739), (127, 157257), (173, 115443), (303, 65913), (381, 52419), (519, 38481), (909, 21971), (1143, 17473), (1557, 12827)]