16865890

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{643}}^1$

素因数の和:754

約数の個数: 32

約数和(自身を含む): 31622976

約数和(自身を除く): 14757086

約数列:

[1, 2, 5, 10, 43, 61, 86, 122, 215, 305, 430, 610, 643, 1286, 2623, 3215, 5246, 6430, 13115, 26230, 27649, 39223, 55298, 78446, 138245, 196115, 276490, 392230, 1686589, 3373178, 8432945, 16865890]

約数ペア:

[(1, 16865890), (2, 8432945), (5, 3373178), (10, 1686589), (43, 392230), (61, 276490), (86, 196115), (122, 138245), (215, 78446), (305, 55298), (430, 39223), (610, 27649), (643, 26230), (1286, 13115), (2623, 6430), (3215, 5246)]