81972520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{292759}}^1$

素因数の和:292777

約数の個数: 32

約数和(自身を含む): 210787200

約数和(自身を除く): 128814680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 292759, 585518, 1171036, 1463795, 2049313, 2342072, 2927590, 4098626, 5855180, 8197252, 10246565, 11710360, 16394504, 20493130, 40986260, 81972520]

約数ペア:

[(1, 81972520), (2, 40986260), (4, 20493130), (5, 16394504), (7, 11710360), (8, 10246565), (10, 8197252), (14, 5855180), (20, 4098626), (28, 2927590), (35, 2342072), (40, 2049313), (56, 1463795), (70, 1171036), (140, 585518), (280, 292759)]