87720920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{313289}}^1$

素因数の和:313307

約数の個数: 32

約数和(自身を含む): 225568800

約数和(自身を除く): 137847880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 313289, 626578, 1253156, 1566445, 2193023, 2506312, 3132890, 4386046, 6265780, 8772092, 10965115, 12531560, 17544184, 21930230, 43860460, 87720920]

約数ペア:

[(1, 87720920), (2, 43860460), (4, 21930230), (5, 17544184), (7, 12531560), (8, 10965115), (10, 8772092), (14, 6265780), (20, 4386046), (28, 3132890), (35, 2506312), (40, 2193023), (56, 1566445), (70, 1253156), (140, 626578), (280, 313289)]