129906880

素因数分解:

$2^6\times 5^1\times {\mathrm{405959}}^1$

素因数の和:405976

約数の個数: 28

約数和(自身を含む): 309341520

約数和(自身を除く): 179434640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 405959, 811918, 1623836, 2029795, 3247672, 4059590, 6495344, 8119180, 12990688, 16238360, 25981376, 32476720, 64953440, 129906880]

約数ペア:

[(1, 129906880), (2, 64953440), (4, 32476720), (5, 25981376), (8, 16238360), (10, 12990688), (16, 8119180), (20, 6495344), (32, 4059590), (40, 3247672), (64, 2029795), (80, 1623836), (160, 811918), (320, 405959)]