21519533

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{4373}}^1$

素因数の和:4436

約数の個数: 16

約数和(自身を含む): 26593920

約数和(自身を除く): 5074387

約数列:

[1, 7, 19, 37, 133, 259, 703, 4373, 4921, 30611, 83087, 161801, 581609, 1132607, 3074219, 21519533]

約数ペア:

[(1, 21519533), (7, 3074219), (19, 1132607), (37, 581609), (133, 161801), (259, 83087), (703, 30611), (4373, 4921)]