128840920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{247771}}^1$

素因数の和:247795

約数の個数: 32

約数和(自身を含む): 312192720

約数和(自身を除く): 183351800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 247771, 495542, 991084, 1238855, 1982168, 2477710, 3221023, 4955420, 6442046, 9910840, 12884092, 16105115, 25768184, 32210230, 64420460, 128840920]

約数ペア:

[(1, 128840920), (2, 64420460), (4, 32210230), (5, 25768184), (8, 16105115), (10, 12884092), (13, 9910840), (20, 6442046), (26, 4955420), (40, 3221023), (52, 2477710), (65, 1982168), (104, 1238855), (130, 991084), (260, 495542), (520, 247771)]