20698678

素因数分解:

$2^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 42739200

約数和(自身を除く): 22040522

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 49, 77, 91, 98, 143, 154, 182, 211, 286, 343, 422, 539, 637, 686, 1001, 1078, 1274, 1477, 2002, 2321, 2743, 2954, 3773, 4459, 4642, 5486, 7007, 7546, 8918, 10339, 14014, 16247, 19201, 20678, 30173, 32494, 38402, 49049, 60346, 72373, 98098, 113729, 134407, 144746, 211211, 227458, 268814, 422422, 796103, 940849, 1478477, 1592206, 1881698, 2956954, 10349339, 20698678]

約数ペア:

[(1, 20698678), (2, 10349339), (7, 2956954), (11, 1881698), (13, 1592206), (14, 1478477), (22, 940849), (26, 796103), (49, 422422), (77, 268814), (91, 227458), (98, 211211), (143, 144746), (154, 134407), (182, 113729), (211, 98098), (286, 72373), (343, 60346), (422, 49049), (539, 38402), (637, 32494), (686, 30173), (1001, 20678), (1078, 19201), (1274, 16247), (1477, 14014), (2002, 10339), (2321, 8918), (2743, 7546), (2954, 7007), (3773, 5486), (4459, 4642)]