21136878

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{227}}^1\times {\mathrm{739}}^1$

素因数の和:981

約数の個数: 48

約数和(自身を含む): 52640640

約数和(自身を除く): 31503762

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 227, 454, 681, 739, 1362, 1478, 1589, 2043, 2217, 3178, 4086, 4434, 4767, 5173, 6651, 9534, 10346, 13302, 14301, 15519, 28602, 31038, 46557, 93114, 167753, 335506, 503259, 1006518, 1174271, 1509777, 2348542, 3019554, 3522813, 7045626, 10568439, 21136878]

約数ペア:

[(1, 21136878), (2, 10568439), (3, 7045626), (6, 3522813), (7, 3019554), (9, 2348542), (14, 1509777), (18, 1174271), (21, 1006518), (42, 503259), (63, 335506), (126, 167753), (227, 93114), (454, 46557), (681, 31038), (739, 28602), (1362, 15519), (1478, 14301), (1589, 13302), (2043, 10346), (2217, 9534), (3178, 6651), (4086, 5173), (4434, 4767)]