19721538

素因数分解:

$2^1\times 3^2\times {\mathrm{547}}^1\times {\mathrm{2003}}^1$

素因数の和:2558

約数の個数: 24

約数和(自身を含む): 42829488

約数和(自身を除く): 23107950

約数列:

[1, 2, 3, 6, 9, 18, 547, 1094, 1641, 2003, 3282, 4006, 4923, 6009, 9846, 12018, 18027, 36054, 1095641, 2191282, 3286923, 6573846, 9860769, 19721538]

約数ペア:

[(1, 19721538), (2, 9860769), (3, 6573846), (6, 3286923), (9, 2191282), (18, 1095641), (547, 36054), (1094, 18027), (1641, 12018), (2003, 9846), (3282, 6009), (4006, 4923)]