128949320

素因数分解:

$2^3\times 5^1\times {\mathrm{1723}}^1\times {\mathrm{1871}}^1$

素因数の和:3605

約数の個数: 32

約数和(自身を含む): 290459520

約数和(自身を除く): 161510200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1723, 1871, 3446, 3742, 6892, 7484, 8615, 9355, 13784, 14968, 17230, 18710, 34460, 37420, 68920, 74840, 3223733, 6447466, 12894932, 16118665, 25789864, 32237330, 64474660, 128949320]

約数ペア:

[(1, 128949320), (2, 64474660), (4, 32237330), (5, 25789864), (8, 16118665), (10, 12894932), (20, 6447466), (40, 3223733), (1723, 74840), (1871, 68920), (3446, 37420), (3742, 34460), (6892, 18710), (7484, 17230), (8615, 14968), (9355, 13784)]