21865921

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{1427}}^1$

素因数の和:1644

約数の個数: 16

約数和(自身を含む): 27417600

約数和(自身を除く): 5551679

約数列:

[1, 7, 11, 77, 199, 1393, 1427, 2189, 9989, 15323, 15697, 109879, 283973, 1987811, 3123703, 21865921]

約数ペア:

[(1, 21865921), (7, 3123703), (11, 1987811), (77, 283973), (199, 109879), (1393, 15697), (1427, 15323), (2189, 9989)]