64128920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{39103}}^1$

素因数の和:39155

約数の個数: 32

約数和(自身を含む): 147813120

約数和(自身を除く): 83684200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 39103, 78206, 156412, 195515, 312824, 391030, 782060, 1564120, 1603223, 3206446, 6412892, 8016115, 12825784, 16032230, 32064460, 64128920]

約数ペア:

[(1, 64128920), (2, 32064460), (4, 16032230), (5, 12825784), (8, 8016115), (10, 6412892), (20, 3206446), (40, 1603223), (41, 1564120), (82, 782060), (164, 391030), (205, 312824), (328, 195515), (410, 156412), (820, 78206), (1640, 39103)]