21406385

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1$

素因数の和:103

約数の個数: 72

約数和(自身を含む): 36049536

約数和(自身を除く): 14643151

約数列:

[1, 5, 7, 11, 13, 35, 47, 49, 55, 65, 77, 91, 143, 169, 235, 245, 329, 385, 455, 517, 539, 611, 637, 715, 845, 1001, 1183, 1645, 1859, 2303, 2585, 2695, 3055, 3185, 3619, 4277, 5005, 5915, 6721, 7007, 7943, 8281, 9295, 11515, 13013, 18095, 21385, 25333, 29939, 33605, 35035, 39715, 41405, 47047, 55601, 65065, 87373, 91091, 126665, 149695, 235235, 278005, 329329, 389207, 436865, 455455, 611611, 1646645, 1946035, 3058055, 4281277, 21406385]

約数ペア:

[(1, 21406385), (5, 4281277), (7, 3058055), (11, 1946035), (13, 1646645), (35, 611611), (47, 455455), (49, 436865), (55, 389207), (65, 329329), (77, 278005), (91, 235235), (143, 149695), (169, 126665), (235, 91091), (245, 87373), (329, 65065), (385, 55601), (455, 47047), (517, 41405), (539, 39715), (611, 35035), (637, 33605), (715, 29939), (845, 25333), (1001, 21385), (1183, 18095), (1645, 13013), (1859, 11515), (2303, 9295), (2585, 8281), (2695, 7943), (3055, 7007), (3185, 6721), (3619, 5915), (4277, 5005)]