127788440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{245747}}^1$

素因数の和:245771

約数の個数: 32

約数和(自身を含む): 309642480

約数和(自身を除く): 181854040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 245747, 491494, 982988, 1228735, 1965976, 2457470, 3194711, 4914940, 6389422, 9829880, 12778844, 15973555, 25557688, 31947110, 63894220, 127788440]

約数ペア:

[(1, 127788440), (2, 63894220), (4, 31947110), (5, 25557688), (8, 15973555), (10, 12778844), (13, 9829880), (20, 6389422), (26, 4914940), (40, 3194711), (52, 2457470), (65, 1965976), (104, 1228735), (130, 982988), (260, 491494), (520, 245747)]