21493639870

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{709}}^1\times {\mathrm{70501}}^1$

素因数の和:71260

約数の個数: 32

約数和(自身を含む): 39644684640

約数和(自身を除く): 18151044770

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 709, 1418, 3545, 7090, 30487, 60974, 70501, 141002, 152435, 304870, 352505, 705010, 3031543, 6063086, 15157715, 30315430, 49985209, 99970418, 249926045, 499852090, 2149363987, 4298727974, 10746819935, 21493639870]

約数ペア:

[(1, 21493639870), (2, 10746819935), (5, 4298727974), (10, 2149363987), (43, 499852090), (86, 249926045), (215, 99970418), (430, 49985209), (709, 30315430), (1418, 15157715), (3545, 6063086), (7090, 3031543), (30487, 705010), (60974, 352505), (70501, 304870), (141002, 152435)]