278973747

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{21481}}^1$

素因数の和:21540

約数の個数: 32

約数和(自身を含む): 457136960

約数和(自身を除く): 178163213

約数列:

[1, 3, 9, 13, 27, 37, 39, 111, 117, 333, 351, 481, 999, 1443, 4329, 12987, 21481, 64443, 193329, 279253, 579987, 794797, 837759, 2384391, 2513277, 7153173, 7539831, 10332361, 21459519, 30997083, 92991249, 278973747]

約数ペア:

[(1, 278973747), (3, 92991249), (9, 30997083), (13, 21459519), (27, 10332361), (37, 7539831), (39, 7153173), (111, 2513277), (117, 2384391), (333, 837759), (351, 794797), (481, 579987), (999, 279253), (1443, 193329), (4329, 64443), (12987, 21481)]