19817990

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{63929}}^1$

素因数の和:63967

約数の個数: 16

約数和(自身を含む): 36823680

約数和(自身を除く): 17005690

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 63929, 127858, 319645, 639290, 1981799, 3963598, 9908995, 19817990]

約数ペア:

[(1, 19817990), (2, 9908995), (5, 3963598), (10, 1981799), (31, 639290), (62, 319645), (155, 127858), (310, 63929)]