20405385

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1$

素因数の和:196

約数の個数: 128

約数和(自身を含む): 49029120

約数和(自身を除く): 28623735

約数列:

[1, 3, 5, 7, 9, 11, 13, 15, 21, 27, 33, 35, 39, 45, 55, 63, 65, 77, 91, 99, 105, 117, 135, 143, 151, 165, 189, 195, 231, 273, 297, 315, 351, 385, 429, 453, 455, 495, 585, 693, 715, 755, 819, 945, 1001, 1057, 1155, 1287, 1359, 1365, 1485, 1661, 1755, 1963, 2079, 2145, 2265, 2457, 3003, 3171, 3465, 3861, 4077, 4095, 4983, 5005, 5285, 5889, 6435, 6795, 8305, 9009, 9513, 9815, 10395, 11627, 12285, 13741, 14949, 15015, 15855, 17667, 19305, 20385, 21593, 24915, 27027, 28539, 29445, 34881, 41223, 44847, 45045, 47565, 53001, 58135, 64779, 68705, 74745, 88335, 104643, 107965, 123669, 135135, 142695, 151151, 174405, 194337, 206115, 224235, 265005, 313929, 323895, 371007, 453453, 523215, 583011, 618345, 755755, 971685, 1360359, 1569645, 1855035, 2267265, 2915055, 4081077, 6801795, 20405385]

約数ペア:

[(1, 20405385), (3, 6801795), (5, 4081077), (7, 2915055), (9, 2267265), (11, 1855035), (13, 1569645), (15, 1360359), (21, 971685), (27, 755755), (33, 618345), (35, 583011), (39, 523215), (45, 453453), (55, 371007), (63, 323895), (65, 313929), (77, 265005), (91, 224235), (99, 206115), (105, 194337), (117, 174405), (135, 151151), (143, 142695), (151, 135135), (165, 123669), (189, 107965), (195, 104643), (231, 88335), (273, 74745), (297, 68705), (315, 64779), (351, 58135), (385, 53001), (429, 47565), (453, 45045), (455, 44847), (495, 41223), (585, 34881), (693, 29445), (715, 28539), (755, 27027), (819, 24915), (945, 21593), (1001, 20385), (1057, 19305), (1155, 17667), (1287, 15855), (1359, 15015), (1365, 14949), (1485, 13741), (1661, 12285), (1755, 11627), (1963, 10395), (2079, 9815), (2145, 9513), (2265, 9009), (2457, 8305), (3003, 6795), (3171, 6435), (3465, 5889), (3861, 5285), (4077, 5005), (4095, 4983)]