19981465

素因数分解:

$5^1\times 7^3\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:278

約数の個数: 32

約数和(自身を含む): 28569600

約数和(自身を除く): 8588135

約数列:

[1, 5, 7, 35, 49, 61, 191, 245, 305, 343, 427, 955, 1337, 1715, 2135, 2989, 6685, 9359, 11651, 14945, 20923, 46795, 58255, 65513, 81557, 104615, 327565, 407785, 570899, 2854495, 3996293, 19981465]

約数ペア:

[(1, 19981465), (5, 3996293), (7, 2854495), (35, 570899), (49, 407785), (61, 327565), (191, 104615), (245, 81557), (305, 65513), (343, 58255), (427, 46795), (955, 20923), (1337, 14945), (1715, 11651), (2135, 9359), (2989, 6685)]