21591105

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{227}}^1\times {\mathrm{373}}^1$

素因数の和:625

約数の個数: 32

約数和(自身を含む): 36837504

約数和(自身を除く): 15246399

約数列:

[1, 3, 5, 15, 17, 51, 85, 227, 255, 373, 681, 1119, 1135, 1865, 3405, 3859, 5595, 6341, 11577, 19023, 19295, 31705, 57885, 84671, 95115, 254013, 423355, 1270065, 1439407, 4318221, 7197035, 21591105]

約数ペア:

[(1, 21591105), (3, 7197035), (5, 4318221), (15, 1439407), (17, 1270065), (51, 423355), (85, 254013), (227, 95115), (255, 84671), (373, 57885), (681, 31705), (1119, 19295), (1135, 19023), (1865, 11577), (3405, 6341), (3859, 5595)]