19978668

素因数分解:

$2^2\times 3^2\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{283}}^1$

素因数の和:383

約数の個数: 72

約数和(自身を含む): 53031888

約数和(自身を除く): 33053220

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 37, 53, 74, 106, 111, 148, 159, 212, 222, 283, 318, 333, 444, 477, 566, 636, 666, 849, 954, 1132, 1332, 1698, 1908, 1961, 2547, 3396, 3922, 5094, 5883, 7844, 10188, 10471, 11766, 14999, 17649, 20942, 23532, 29998, 31413, 35298, 41884, 44997, 59996, 62826, 70596, 89994, 94239, 125652, 134991, 179988, 188478, 269982, 376956, 539964, 554963, 1109926, 1664889, 2219852, 3329778, 4994667, 6659556, 9989334, 19978668]

約数ペア:

[(1, 19978668), (2, 9989334), (3, 6659556), (4, 4994667), (6, 3329778), (9, 2219852), (12, 1664889), (18, 1109926), (36, 554963), (37, 539964), (53, 376956), (74, 269982), (106, 188478), (111, 179988), (148, 134991), (159, 125652), (212, 94239), (222, 89994), (283, 70596), (318, 62826), (333, 59996), (444, 44997), (477, 41884), (566, 35298), (636, 31413), (666, 29998), (849, 23532), (954, 20942), (1132, 17649), (1332, 14999), (1698, 11766), (1908, 10471), (1961, 10188), (2547, 7844), (3396, 5883), (3922, 5094)]