21021372

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{421}}^1$

素因数の和:523

約数の個数: 72

約数和(自身を含む): 56834960

約数和(自身を除く): 35813588

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 73, 76, 114, 146, 171, 219, 228, 292, 342, 421, 438, 657, 684, 842, 876, 1263, 1314, 1387, 1684, 2526, 2628, 2774, 3789, 4161, 5052, 5548, 7578, 7999, 8322, 12483, 15156, 15998, 16644, 23997, 24966, 30733, 31996, 47994, 49932, 61466, 71991, 92199, 95988, 122932, 143982, 184398, 276597, 287964, 368796, 553194, 583927, 1106388, 1167854, 1751781, 2335708, 3503562, 5255343, 7007124, 10510686, 21021372]

約数ペア:

[(1, 21021372), (2, 10510686), (3, 7007124), (4, 5255343), (6, 3503562), (9, 2335708), (12, 1751781), (18, 1167854), (19, 1106388), (36, 583927), (38, 553194), (57, 368796), (73, 287964), (76, 276597), (114, 184398), (146, 143982), (171, 122932), (219, 95988), (228, 92199), (292, 71991), (342, 61466), (421, 49932), (438, 47994), (657, 31996), (684, 30733), (842, 24966), (876, 23997), (1263, 16644), (1314, 15998), (1387, 15156), (1684, 12483), (2526, 8322), (2628, 7999), (2774, 7578), (3789, 5548), (4161, 5052)]