21533325

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{607}}^1$

素因数の和:674

約数の個数: 48

約数和(自身を含む): 39806976

約数和(自身を除く): 18273651

約数列:

[1, 3, 5, 11, 15, 25, 33, 43, 55, 75, 129, 165, 215, 275, 473, 607, 645, 825, 1075, 1419, 1821, 2365, 3035, 3225, 6677, 7095, 9105, 11825, 15175, 20031, 26101, 33385, 35475, 45525, 78303, 100155, 130505, 166925, 287111, 391515, 500775, 652525, 861333, 1435555, 1957575, 4306665, 7177775, 21533325]

約数ペア:

[(1, 21533325), (3, 7177775), (5, 4306665), (11, 1957575), (15, 1435555), (25, 861333), (33, 652525), (43, 500775), (55, 391515), (75, 287111), (129, 166925), (165, 130505), (215, 100155), (275, 78303), (473, 45525), (607, 35475), (645, 33385), (825, 26101), (1075, 20031), (1419, 15175), (1821, 11825), (2365, 9105), (3035, 7095), (3225, 6677)]