19665640

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1913}}^1$

素因数の和:2181

約数の個数: 32

約数和(自身を含む): 44443080

約数和(自身を除く): 24777440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 1913, 2056, 2570, 3826, 5140, 7652, 9565, 10280, 15304, 19130, 38260, 76520, 491641, 983282, 1966564, 2458205, 3933128, 4916410, 9832820, 19665640]

約数ペア:

[(1, 19665640), (2, 9832820), (4, 4916410), (5, 3933128), (8, 2458205), (10, 1966564), (20, 983282), (40, 491641), (257, 76520), (514, 38260), (1028, 19130), (1285, 15304), (1913, 10280), (2056, 9565), (2570, 7652), (3826, 5140)]