21790055

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 33269760

約数和(自身を除く): 11479705

約数列:

[1, 5, 7, 19, 31, 35, 49, 95, 133, 151, 155, 217, 245, 589, 665, 755, 931, 1057, 1085, 1519, 2869, 2945, 4123, 4655, 4681, 5285, 7399, 7595, 14345, 20083, 20615, 23405, 28861, 32767, 36995, 88939, 100415, 140581, 144305, 163835, 229369, 444695, 622573, 702905, 1146845, 3112865, 4358011, 21790055]

約数ペア:

[(1, 21790055), (5, 4358011), (7, 3112865), (19, 1146845), (31, 702905), (35, 622573), (49, 444695), (95, 229369), (133, 163835), (151, 144305), (155, 140581), (217, 100415), (245, 88939), (589, 36995), (665, 32767), (755, 28861), (931, 23405), (1057, 20615), (1085, 20083), (1519, 14345), (2869, 7595), (2945, 7399), (4123, 5285), (4655, 4681)]