128432720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{123493}}^1$

素因数の和:123519

約数の個数: 40

約数和(自身を含む): 321578376

約数和(自身を除く): 193145656

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 123493, 246986, 493972, 617465, 987944, 1234930, 1605409, 1975888, 2469860, 3210818, 4939720, 6421636, 8027045, 9879440, 12843272, 16054090, 25686544, 32108180, 64216360, 128432720]

約数ペア:

[(1, 128432720), (2, 64216360), (4, 32108180), (5, 25686544), (8, 16054090), (10, 12843272), (13, 9879440), (16, 8027045), (20, 6421636), (26, 4939720), (40, 3210818), (52, 2469860), (65, 1975888), (80, 1605409), (104, 1234930), (130, 987944), (208, 617465), (260, 493972), (520, 246986), (1040, 123493)]