19815905

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:185

約数の個数: 32

約数和(自身を含む): 26002944

約数和(自身を除く): 6187039

約数列:

[1, 5, 37, 43, 47, 53, 185, 215, 235, 265, 1591, 1739, 1961, 2021, 2279, 2491, 7955, 8695, 9805, 10105, 11395, 12455, 74777, 84323, 92167, 107113, 373885, 421615, 460835, 535565, 3963181, 19815905]

約数ペア:

[(1, 19815905), (5, 3963181), (37, 535565), (43, 460835), (47, 421615), (53, 373885), (185, 107113), (215, 92167), (235, 84323), (265, 74777), (1591, 12455), (1739, 11395), (1961, 10105), (2021, 9805), (2279, 8695), (2491, 7955)]