28818920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{353}}^1$

素因数の和:534

約数の個数: 64

約数和(自身を含む): 70474320

約数和(自身を除く): 41655400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 157, 260, 314, 353, 520, 628, 706, 785, 1256, 1412, 1570, 1765, 2041, 2824, 3140, 3530, 4082, 4589, 6280, 7060, 8164, 9178, 10205, 14120, 16328, 18356, 20410, 22945, 36712, 40820, 45890, 55421, 81640, 91780, 110842, 183560, 221684, 277105, 443368, 554210, 720473, 1108420, 1440946, 2216840, 2881892, 3602365, 5763784, 7204730, 14409460, 28818920]

約数ペア:

[(1, 28818920), (2, 14409460), (4, 7204730), (5, 5763784), (8, 3602365), (10, 2881892), (13, 2216840), (20, 1440946), (26, 1108420), (40, 720473), (52, 554210), (65, 443368), (104, 277105), (130, 221684), (157, 183560), (260, 110842), (314, 91780), (353, 81640), (520, 55421), (628, 45890), (706, 40820), (785, 36712), (1256, 22945), (1412, 20410), (1570, 18356), (1765, 16328), (2041, 14120), (2824, 10205), (3140, 9178), (3530, 8164), (4082, 7060), (4589, 6280)]