128512880

素因数分解:

$2^4\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1621}}^1$

素因数の和:2625

約数の個数: 40

約数和(自身を含む): 299278464

約数和(自身を除く): 170765584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 991, 1621, 1982, 3242, 3964, 4955, 6484, 7928, 8105, 9910, 12968, 15856, 16210, 19820, 25936, 32420, 39640, 64840, 79280, 129680, 1606411, 3212822, 6425644, 8032055, 12851288, 16064110, 25702576, 32128220, 64256440, 128512880]

約数ペア:

[(1, 128512880), (2, 64256440), (4, 32128220), (5, 25702576), (8, 16064110), (10, 12851288), (16, 8032055), (20, 6425644), (40, 3212822), (80, 1606411), (991, 129680), (1621, 79280), (1982, 64840), (3242, 39640), (3964, 32420), (4955, 25936), (6484, 19820), (7928, 16210), (8105, 15856), (9910, 12968)]