21203478

素因数分解:

$2^1\times 3^3\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 49371840

約数和(自身を除く): 28168362

約数列:

[1, 2, 3, 6, 9, 18, 27, 41, 54, 61, 82, 122, 123, 157, 183, 246, 314, 366, 369, 471, 549, 738, 942, 1098, 1107, 1413, 1647, 2214, 2501, 2826, 3294, 4239, 5002, 6437, 7503, 8478, 9577, 12874, 15006, 19154, 19311, 22509, 28731, 38622, 45018, 57462, 57933, 67527, 86193, 115866, 135054, 172386, 173799, 258579, 347598, 392657, 517158, 785314, 1177971, 2355942, 3533913, 7067826, 10601739, 21203478]

約数ペア:

[(1, 21203478), (2, 10601739), (3, 7067826), (6, 3533913), (9, 2355942), (18, 1177971), (27, 785314), (41, 517158), (54, 392657), (61, 347598), (82, 258579), (122, 173799), (123, 172386), (157, 135054), (183, 115866), (246, 86193), (314, 67527), (366, 57933), (369, 57462), (471, 45018), (549, 38622), (738, 28731), (942, 22509), (1098, 19311), (1107, 19154), (1413, 15006), (1647, 12874), (2214, 9577), (2501, 8478), (2826, 7503), (3294, 6437), (4239, 5002)]