129276880

素因数分解:

$2^4\times 5^1\times {\mathrm{641}}^1\times {\mathrm{2521}}^1$

素因数の和:3175

約数の個数: 40

約数和(自身を含む): 301157064

約数和(自身を除く): 171880184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 641, 1282, 2521, 2564, 3205, 5042, 5128, 6410, 10084, 10256, 12605, 12820, 20168, 25210, 25640, 40336, 50420, 51280, 100840, 201680, 1615961, 3231922, 6463844, 8079805, 12927688, 16159610, 25855376, 32319220, 64638440, 129276880]

約数ペア:

[(1, 129276880), (2, 64638440), (4, 32319220), (5, 25855376), (8, 16159610), (10, 12927688), (16, 8079805), (20, 6463844), (40, 3231922), (80, 1615961), (641, 201680), (1282, 100840), (2521, 51280), (2564, 50420), (3205, 40336), (5042, 25640), (5128, 25210), (6410, 20168), (10084, 12820), (10256, 12605)]