61520840

素因数分解:

$2^3\times 5^1\times {\mathrm{353}}^1\times {\mathrm{4357}}^1$

素因数の和:4721

約数の個数: 32

約数和(自身を含む): 138845880

約数和(自身を除く): 77325040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 353, 706, 1412, 1765, 2824, 3530, 4357, 7060, 8714, 14120, 17428, 21785, 34856, 43570, 87140, 174280, 1538021, 3076042, 6152084, 7690105, 12304168, 15380210, 30760420, 61520840]

約数ペア:

[(1, 61520840), (2, 30760420), (4, 15380210), (5, 12304168), (8, 7690105), (10, 6152084), (20, 3076042), (40, 1538021), (353, 174280), (706, 87140), (1412, 43570), (1765, 34856), (2824, 21785), (3530, 17428), (4357, 14120), (7060, 8714)]