65432720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{19949}}^1$

素因数の和:20003

約数の個数: 40

約数和(自身を含む): 155849400

約数和(自身を除く): 90416680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 19949, 39898, 79796, 99745, 159592, 199490, 319184, 398980, 797960, 817909, 1595920, 1635818, 3271636, 4089545, 6543272, 8179090, 13086544, 16358180, 32716360, 65432720]

約数ペア:

[(1, 65432720), (2, 32716360), (4, 16358180), (5, 13086544), (8, 8179090), (10, 6543272), (16, 4089545), (20, 3271636), (40, 1635818), (41, 1595920), (80, 817909), (82, 797960), (164, 398980), (205, 319184), (328, 199490), (410, 159592), (656, 99745), (820, 79796), (1640, 39898), (3280, 19949)]