21003788

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{5689}}^1$

素因数の和:5777

約数の個数: 24

約数和(自身を含む): 40148640

約数和(自身を除く): 19144852

約数列:

[1, 2, 4, 13, 26, 52, 71, 142, 284, 923, 1846, 3692, 5689, 11378, 22756, 73957, 147914, 295828, 403919, 807838, 1615676, 5250947, 10501894, 21003788]

約数ペア:

[(1, 21003788), (2, 10501894), (4, 5250947), (13, 1615676), (26, 807838), (52, 403919), (71, 295828), (142, 147914), (284, 73957), (923, 22756), (1846, 11378), (3692, 5689)]