21386120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76379}}^1$

素因数の和:76397

約数の個数: 32

約数和(自身を含む): 54993600

約数和(自身を除く): 33607480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76379, 152758, 305516, 381895, 534653, 611032, 763790, 1069306, 1527580, 2138612, 2673265, 3055160, 4277224, 5346530, 10693060, 21386120]

約数ペア:

[(1, 21386120), (2, 10693060), (4, 5346530), (5, 4277224), (7, 3055160), (8, 2673265), (10, 2138612), (14, 1527580), (20, 1069306), (28, 763790), (35, 611032), (40, 534653), (56, 381895), (70, 305516), (140, 152758), (280, 76379)]