21043451

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:203

約数の個数: 32

約数和(自身を含む): 26320896

約数和(自身を除く): 5277445

約数列:

[1, 11, 13, 31, 47, 101, 143, 341, 403, 517, 611, 1111, 1313, 1457, 3131, 4433, 4747, 6721, 14443, 16027, 18941, 34441, 40703, 52217, 61711, 147157, 208351, 447733, 678821, 1618727, 1913041, 21043451]

約数ペア:

[(1, 21043451), (11, 1913041), (13, 1618727), (31, 678821), (47, 447733), (101, 208351), (143, 147157), (341, 61711), (403, 52217), (517, 40703), (611, 34441), (1111, 18941), (1313, 16027), (1457, 14443), (3131, 6721), (4433, 4747)]