20976993

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{491}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 31314816

約数和(自身を除く): 10337823

約数列:

[1, 3, 9, 47, 101, 141, 303, 423, 491, 909, 1473, 4419, 4747, 14241, 23077, 42723, 49591, 69231, 148773, 207693, 446319, 2330777, 6992331, 20976993]

約数ペア:

[(1, 20976993), (3, 6992331), (9, 2330777), (47, 446319), (101, 207693), (141, 148773), (303, 69231), (423, 49591), (491, 42723), (909, 23077), (1473, 14241), (4419, 4747)]