21371994

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2389}}^1$

素因数の和:2475

約数の個数: 48

約数和(自身を含む): 53688960

約数和(自身を除く): 32316966

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 71, 126, 142, 213, 426, 497, 639, 994, 1278, 1491, 2389, 2982, 4473, 4778, 7167, 8946, 14334, 16723, 21501, 33446, 43002, 50169, 100338, 150507, 169619, 301014, 339238, 508857, 1017714, 1187333, 1526571, 2374666, 3053142, 3561999, 7123998, 10685997, 21371994]

約数ペア:

[(1, 21371994), (2, 10685997), (3, 7123998), (6, 3561999), (7, 3053142), (9, 2374666), (14, 1526571), (18, 1187333), (21, 1017714), (42, 508857), (63, 339238), (71, 301014), (126, 169619), (142, 150507), (213, 100338), (426, 50169), (497, 43002), (639, 33446), (994, 21501), (1278, 16723), (1491, 14334), (2389, 8946), (2982, 7167), (4473, 4778)]