20712195

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1399}}^1$

素因数の和:1464

約数の個数: 48

約数和(自身を含む): 41932800

約数和(自身を除く): 21220605

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 47, 63, 105, 141, 235, 315, 329, 423, 705, 987, 1399, 1645, 2115, 2961, 4197, 4935, 6995, 9793, 12591, 14805, 20985, 29379, 48965, 62955, 65753, 88137, 146895, 197259, 328765, 440685, 460271, 591777, 986295, 1380813, 2301355, 2958885, 4142439, 6904065, 20712195]

約数ペア:

[(1, 20712195), (3, 6904065), (5, 4142439), (7, 2958885), (9, 2301355), (15, 1380813), (21, 986295), (35, 591777), (45, 460271), (47, 440685), (63, 328765), (105, 197259), (141, 146895), (235, 88137), (315, 65753), (329, 62955), (423, 48965), (705, 29379), (987, 20985), (1399, 14805), (1645, 12591), (2115, 9793), (2961, 6995), (4197, 4935)]