21388444

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{59}}^1\times {\mathrm{107}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 48263040

約数和(自身を除く): 26874596

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 59, 77, 107, 118, 121, 154, 214, 236, 242, 308, 413, 428, 484, 649, 749, 826, 847, 1177, 1298, 1498, 1652, 1694, 2354, 2596, 2996, 3388, 4543, 4708, 6313, 7139, 8239, 9086, 12626, 12947, 14278, 16478, 18172, 25252, 25894, 28556, 32956, 44191, 49973, 51788, 69443, 88382, 90629, 99946, 138886, 176764, 181258, 199892, 277772, 362516, 486101, 763873, 972202, 1527746, 1944404, 3055492, 5347111, 10694222, 21388444]

約数ペア:

[(1, 21388444), (2, 10694222), (4, 5347111), (7, 3055492), (11, 1944404), (14, 1527746), (22, 972202), (28, 763873), (44, 486101), (59, 362516), (77, 277772), (107, 199892), (118, 181258), (121, 176764), (154, 138886), (214, 99946), (236, 90629), (242, 88382), (308, 69443), (413, 51788), (428, 49973), (484, 44191), (649, 32956), (749, 28556), (826, 25894), (847, 25252), (1177, 18172), (1298, 16478), (1498, 14278), (1652, 12947), (1694, 12626), (2354, 9086), (2596, 8239), (2996, 7139), (3388, 6313), (4543, 4708)]