20657408

素因数分解:

$2^8\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:203

約数の個数: 72

約数和(自身を含む): 45131520

約数和(自身を除く): 24474112

約数列:

[1, 2, 4, 8, 16, 19, 31, 32, 38, 62, 64, 76, 124, 128, 137, 152, 248, 256, 274, 304, 496, 548, 589, 608, 992, 1096, 1178, 1216, 1984, 2192, 2356, 2432, 2603, 3968, 4247, 4384, 4712, 4864, 5206, 7936, 8494, 8768, 9424, 10412, 16988, 17536, 18848, 20824, 33976, 35072, 37696, 41648, 67952, 75392, 80693, 83296, 135904, 150784, 161386, 166592, 271808, 322772, 333184, 543616, 645544, 666368, 1087232, 1291088, 2582176, 5164352, 10328704, 20657408]

約数ペア:

[(1, 20657408), (2, 10328704), (4, 5164352), (8, 2582176), (16, 1291088), (19, 1087232), (31, 666368), (32, 645544), (38, 543616), (62, 333184), (64, 322772), (76, 271808), (124, 166592), (128, 161386), (137, 150784), (152, 135904), (248, 83296), (256, 80693), (274, 75392), (304, 67952), (496, 41648), (548, 37696), (589, 35072), (608, 33976), (992, 20824), (1096, 18848), (1178, 17536), (1216, 16988), (1984, 10412), (2192, 9424), (2356, 8768), (2432, 8494), (2603, 7936), (3968, 5206), (4247, 4864), (4384, 4712)]