20821626

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{643}}^1$

素因数の和:915

約数の個数: 48

約数和(自身を含む): 51839424

約数和(自身を除く): 31017798

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 257, 514, 643, 771, 1286, 1542, 1799, 1929, 2313, 3598, 3858, 4501, 4626, 5397, 5787, 9002, 10794, 11574, 13503, 16191, 27006, 32382, 40509, 81018, 165251, 330502, 495753, 991506, 1156757, 1487259, 2313514, 2974518, 3470271, 6940542, 10410813, 20821626]

約数ペア:

[(1, 20821626), (2, 10410813), (3, 6940542), (6, 3470271), (7, 2974518), (9, 2313514), (14, 1487259), (18, 1156757), (21, 991506), (42, 495753), (63, 330502), (126, 165251), (257, 81018), (514, 40509), (643, 32382), (771, 27006), (1286, 16191), (1542, 13503), (1799, 11574), (1929, 10794), (2313, 9002), (3598, 5787), (3858, 5397), (4501, 4626)]